问题
The water will be polluted unless some measures _____
A:will be taken
B:are being taken
C:are taken
D:were taken
B:are being taken
C:are taken
D:were taken
正确答案是:
同类题型
My sister seems to prefer _____ music to _____ me.
He was afraid there was any wild animal around him, looking round from ________
The crazy fans _______ patiently for two hours, and they would wait till the movie star arrived
What a beautiful dress you are wearing! It must be expensive. —No. It only ____ me fifty yuan.