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Little _______ that the region was rich in natural resources about four decades ago.

A. we did know B. knew we

C. did we know D. we knew

—Has James arrived at the hotel?

—No, he ______ by fans for photographs at the airport.

A. has surrounded B. would surround

C. was surrounded D. is being surrounded

What the children in the mountain village need ______ good books.

A. is B. are

C. have D. has

Mary really hard on his book and thinks he’ll have finished it by Friday.

A. worked B. has been working

C. had worked D. has worked

That's why I help brighten people's days. If you ________， who's to say that another person will?

A. didn't B. don't

C．weren't D． haven't

So sudden ________that the enemy had no time to escape.

A. did the attack B. the attack did

C. was the attack D. the attack was

It was his word and action but not his appearance _______ moved us deeply.

A. as B. which

C. who D. that