Listen! Who _______ in the classroom now?
A. sing
B. is singing
C. to sing
D. sings
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Don't talk loudly，please. Grandparents _________ in the dormitory at the moment.
A. slept
B. sleeping
C. are sleeping
D. sleep
I see her ____ the room this morning.
A. to enter
B. entered
C. enter
D. enters
You’d better ______ at home and ______ your homework.
A. to stay, do
B. stay, do
C. to stay, to do
D. stay, to do
I can't catch up with the fashion,because the clothes style_______ allthe time.
A. has changed
B. is changed
C. is changing
D. changed
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