1.Dr Smith has been working for four hours.He__very tried.A.has to be B.would be C.must be D.can be2.Tom has to look after his grandma,do a lot of housework and do his homework after school.Oh,that,s too_for a twelve-year-old boy.A.more B.many C.

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1.Dr Smith has been working for four hours.He____very tried.A.has to be B.would be C.must be D.can be2.Tom has to look after his grandma,do a lot of housework and do his homework after school.Oh,that,s too___for a twelve-year-old boy.A.more B.many C.
1.Dr Smith has been working for four hours.He____very tried.
A.has to be B.would be C.must be D.can be
2.Tom has to look after his grandma,do a lot of housework and do his homework after school.Oh,that,s too___for a twelve-year-old boy.
A.more B.many C.much D.lot
3.Is your school far from your home?No.It____me only 10 minutes____to school.
A.takes:to walk B.takes;walking C.spends;to walk D.spends;walking

1.Dr Smith has been working for four hours.He____very tried.A.has to be B.would be C.must be D.can be2.Tom has to look after his grandma,do a lot of housework and do his homework after school.Oh,that,s too___for a twelve-year-old boy.A.more B.many C.
1.C must be: 一定
has to be: 不得不； would be : 将会； can be: 可能会
一直工作了四个小时,肯定很累了
2. C much: 形容量的多少 too much: 太多,是搭配.
more: 没有比较的感觉,并且没有too more； many: 修饰可数名词, too many :太多,修饰可数名词； lot:可以修饰可数和不可数名词, too lot:没有
3. A take sb some time to do sth: 花费某人多少时间做某事; take 的主语为it
spend 的主语必须是人 sb spend some time/ money on sth./ in doing sth

1. c 句子说：史密斯医生一直工作了4个小时了。意思是应该很累了。理由充分。所以选择must，是所有表示推测的情态动词中最语气强烈的一个
2. c 句子说：汤姆要做很多很多事情。这些事情是英语中的不可数名词，因此用much来修饰
3. a 表示花费时间的用法：1. it takes sb. some time to do sth.
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1 c ,此处Must 表示很有把握的猜测。如你爸爸肯定有40多岁了。Your father must be over 40.
2 c 那些事情对于他来说太多了。
3 句式 It takes sb. some time to do sth. 如每天做作业花费我们大量时间。It takes us much time to do our homework.

C CA

请问1.Do you think a cat understands people's gestures than does a dog?为什么是does a dog而不是a dog does?2.Perhapes nobody has contributed more to the education than has Dr.Smith.为什么是 has Dr.Smith而不是Dr.Smith has?A whal 1.Dr Smith has been working for four hours.He____very tried.A.has to be B.would be C.must be D.can be2.Tom has to look after his grandma,do a lot of housework and do his homework after school.Oh,that,s too___for a twelve-year-old boy.A.more B.many C. will someone go and get Dr Smith He's already been sent for.请翻译. 1.Dr.Smith is ____leading expert on stress who has been doing___research in this field A.the;the B.the;/ C.a;/ D.a;the2.When you're in Barcelona,don't miss the picasso Museum-----the building______would make the visit worthwhileA.only B.independently Has Mary got a high fever?Does Dr.Smith feel very well? Mr.Smith has been 什么hospital什么last month Mr.Smith has been here since the factory opened为Mr.Smith has been here since the factory opened为什么用has been? Mr.Smith is not at home.He___to work.A.has gone B.has been C.had been D.had gone Mr. Smith _____from Canada. He____here last year A .went;has been B.has been;has come C.was;has beenD. has come ; is 几道大学英语选择题,望高手赐教,请说明原因.1、 Having been asked to speak at the convention_____.A.some notes were prepared for Dr.Smith.B.Some notes were prepared by Dr.Smith C.The convention members were pleased to hear Dr.Smith D Mr Smith ___ at this school since he ___ to Zhuhai.A:has been taught; came B:has taught; has comeC:has been teaching; has come D:has been teaching; came为什么选D?has been teaching是什么时态? 1.Mr Smith ___ at this school since he ___ to Zhuhai.A:has been taught; came B:has taught; has comeC:has been teachin; has come D:has been teaching; came2.When did you start raising money for the Great Green Wall?A:Since two years ago B:Two years ago (Mr.Smith's passport) has been issued括号里面的是什么关系啊?不是主谓,是. Mr Smith ________ to America 10 years ago and has been there___________. If Mr Smith _______ here, he would have helped youhad beenB. wasC. wereD. has been 高中英语选择it is said that __ Smith has been appointed manager填什么冠词为什么 Mr.Smith has been ____in his research for more than 3 hours. Mr Smith with his parents ______ China since two years ago.A .have been in B has been C has been to说明理由