Lewis was much admired ______ his work on the advanced medical research.
A. on B. in C. for D. with
The pilot, whether ______ or design, made the plane do a sharp turn.
A. by accident B. at times C. suddenly D. all at once
If you ______ go, at least wait until the rain stops.
A. can B. must C. should D. would
The reason for his success is ______ he worked very hard.
A. why B. that C. whether D. how
He couldn’t ______ the fact that the money was found in his house.
A. answer for B. leave for C. account for D. care for
—Who______ it be that is knocking at the door?
—It ______ be Father, but I’m not sure.
A. can; must B. can; may C. must; can D. may; must
