—How often do I need to feed the fish?-They _______ food every day, or they will be hungry.
#52913
A
must give
B
mustn’t give
C
mustn’t be give.
D
must be given
推荐题目
Remember to ________ the lights before you leave the classroom.
#54459
A
turn off
B
turn on
C
turn up
D
turn down
— Why is your bedroom so dirty?— Sorry, Mum. It ___________. I felt very tired after playing soccer.
#54486
A
isn’t cleaned
B
didn’t clean
C
doesn’t clean
D
wasn’t cleaned
I heard him _______ the piano in the next room at 10:00 last night.
#61916
A
played
B
to play
C
playing
D
plays
