Do you know that tea by Shengnong many years ago.
A. invented B. is invented C. was invented
–Lucy, is this your schoolbag?
– No, it _____ be my bag. Bob's name is on it.
A. can’t B. must C. needn’t
Don't be noisy! They for a test.
A. studying B. are studing C. are studying
____ he got an A in the exam, he was still unhappy.
A. Although B. Unless C. If
I like the actors are very famous now.
A. which B. who C. why
– Where is Peter?
He _____ to the teacher’s office.
A. has been B. went C. has gone
