说明理由
1.-Mary,now you have a chance to study in Singapore for a year as an exchange student.Are you interested?
-______ that be true?Of course I'll go.
A.May B.Might C.Can D.Must
2._____ on the floor of small ponds is a new farming industry.
A.Raising crabs B.Crabs are raised
C.Crabs raised D.Raised crabs
3.We have been told that under no circumstances _____ the telephone in the office for personal affairs.
A.may we use B.we may use C.we could use D.did we use