英语选择题 帮着讲讲. __________ clean is a safeguard against disease.A. To be keeping? B. Kept? C. Keep D keeping?

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英语选择题 帮着讲讲. __________ clean is a safeguard against disease.A. To be keeping? B. Kept?   C. Keep  D   keeping?

英语选择题 帮着讲讲. __________ clean is a safeguard against disease.A. To be keeping? B. Kept? C. Keep D keeping?
英语选择题 帮着讲讲
. __________ clean is a safeguard against disease.A. To be keeping? B. Kept? C. Keep D keeping?

英语选择题 帮着讲讲. __________ clean is a safeguard against disease.A. To be keeping? B. Kept? C. Keep D keeping?
D
动名词做主语 因为它是名词性的 其他的非名词性
而A 表示的是目的 与题意不符

d
应该是动名词的才能充当主语

d