问题

ount of fuel supplies being finite and manypeople being wasteful, we will have to install ________ solar heating device inour home

A:a; a
B:the; a
C:the; the
D:a; the

正确答案是：

同类题型

When I go to school, I say “______” to my parents.

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e made full preparations, but it remains______whether they will be able to do a good job in the experiment

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