I just saw Peter in the library.
It _______ be him. He is studying in the classroom.( )
A.needn'tB.mustn'tC.shouldn'tD.can't
— What did your cousin do last Sunday? — She _________ shopping with Lily.
Mike went boating with his friends last weekend. They ______ a good time.
—When did your school hold the sports meet?—Last week. And I _______ the girls’ 400-metre race.
At first, she ___________ Like math, but now she ________.
-Excuse me, look at the sign NO PHOTOS!-Sorry, I _________.