–Who’s your science teacher this term?–Mr. Wang. _______ is a good teacher.
The room ______ an hour ago, and it is bright now.
-My new year’s resolution is to study computer science.- ________________.
He is looking for the bag ______ I bought for him yesterday.
Pater is ______ university student and he comes from ______ island in France.
-Who’s that man riding along the street. Is it Tom?-It ______ be Tom. I saw him in the library just now.