单项选择题

The water will be further polluted unless some measures （）.

A. will be taken
B. are taken
C. were taken
D. had been taken

相关考题

"Can you ask your neighbors for help" "I'm afraid not....

单项选择题"Can you ask your neighbors for help"
"I'm afraid not. I （） know any of them."

A. hardly
B. just
C. seldom
D. only