问题

More and more people have realized that we won’t havecleaner water to drink unless something _______soon.

A: is done
B: was done
C:willbe done
D: to be done

正确答案是：

同类题型

Attention, please! All the mobile phones _______ during the meeting.

We usually haveSportsClubafter school _____ Mondays.

Though the impressionists’ paintings were not popular when they first appeared, they are now accepted as the beginning of ______ we call “modern art”

How many mistakes did you make in the exam —______

This physics problem is too difficult Can you show me __________, Wang Lin?— Sure