When we were young,every evening my brother and I ______ stay at home waiting for our mother.
A.would B.might
C.should D.could
—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
---Is Blake still absent from class?
---I think he be punished if he goes on with it.
A.shall B.must
C.can D.will
Great changes__________ in our school in the past 5 years.
A.took place B.were taken place
C.have taken place D.have been taken place
It is known to us that doing eye exercises_______ our eyes,and that is to say,our eyes can_______ doing eye exercises.
A.benefits to; benefit
B.benefits; be benefited from
C.benefits from; benefit
D.benefits; benefit from
I got up early this morning,but I ________ so because I was not on duty today.
A.mustn’t have done B.needn’t have done
C.didn’t need to do D.can’t have done