She had difficulty _____ up with the rest of the class.A.keepingB.to keep C.keep D.kept
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![She had difficulty _____ up with the rest of the class.A.keepingB.to keep C.keep D.kept](/uploads/image/z/10384878-30-8.jpg?t=She+had+difficulty+_____+up+with+the+rest+of+the+class.A.keepingB.to+keep+C.keep+D.kept)
She had difficulty _____ up with the rest of the class.A.keepingB.to keep C.keep D.kept
She had difficulty _____ up with the rest of the class.
A.keeping
B.to keep
C.keep
D.kept
She had difficulty _____ up with the rest of the class.A.keepingB.to keep C.keep D.kept
B.to keep
have sth to do
B
B
A
have difficulty doing sth.
A. keeping
have difficulty (in) doing sth