I will visit my aunt ____I am free tomorrow. A if B whether C when D after
-Deng Ziqi is quite popular _____ the young now.-So she is. She performed wonderfully _____ the night of the final.
—Can you speak a little louder? I can ______ hear you.—OK.
Look at ______ boy wearing a brown hat. Is he _________ university student?
The man______ is my father.
— How long does it take to get to the library?— _______.