When you are planting trees, the trees ________ straight in the hole.
#36844
A
must put
B
must be put
C
are putting
D
is put
推荐题目
Please hand in your homework as soon as it_________.
#42020
A
finishes
B
will finish
C
is finished
D
will be finished
 Listen! My sister_______ the piano in her room.
#39812
A
play
B
is playing
C
plays
D
Playing
— Have you _______ read this story before? — Yes. I’ve _______ read it.
#41743
A
already; ever
B
yet; just
C
ever; just
D
ever; never