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问题

adequate water for all residents was, until only a few decades ago, a serious problem.

A:Providing
B:Provided
C:Having provided
D:Provide;
正确答案是:
同类题型

ere abroad during the months when we were carrying out the investigation, or they _____ to our help.

There ______ some sheep and a dog at the foot of thehill.

Why are you so busy these days— We_____trees. Why not join us

What’s your name- My name is ____________.

The clever boy made a hole in the wall, _______ he could see _____ was going on inside house.

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