Trees ____ fight air pollution．They are natural air conditioners．
#78302
A
should
B
must
C
need
D
can
推荐题目
- _______ I take my umbrella with me? - _______ better to do so. The weather is changeable.
#74895
A
Must; You'd
B
Shall, It's
C
Need; You'd
D
Would; It's
— Must we finish all the exercises today? — No, you ________.You can finish them within two days.
#76063
A
mustn’t
B
needn’t to
C
needn’t
D
don’t have
(2014·南通第二次学情调研)—In case anyone ________come in my absence，tell him I will be back soon.—Sure，I will.
#62191
A
would
B
should
C
will
D
shall
________ you interrupt now? Can’t you see I’m on the phone?_ Sorry, Sir, but it’s urgent.
#63073
A
Can
B
Should
C
Must
D
Would