Many dinosaurs were harmless to other animals, ________?
A.didn’t they B.did they C.weren’t they D.were they
He speaks English ________ an American, so we all believe that he has stayed in America for many years.
A.as good as B.worse than C.as badly as D.as well as
Many leaders ________ to attend the opening Ceremony（开幕式）of China International Import Expo on Nov. 5, 2018.
A.be invited B.were invited C.will be invited D.have been invited
All of us find it difficult ________ along with Mike and his wife.
A.to get B.getting C.got D.get
Lucy knew nothing about the accident ________ her sister told her.
A.because B.if C.until D.since
There be something. on David’s mind today. for he shows no interest in the food he likes.
A.can B.must C.need D.should
