问题

The _____ population has caused many serious problems.

A:increase
B:increased
C:increasing
D:increases;

正确答案是：

同类题型

Sorry, I have to ________ now. It’s time for class. — OK, I’ll call back later.

Do you know how to _______your e-dog

In those days my family didn’t have enough room _________.

Why not go to Lao She Teahouse tonight

Only then______ have a chance _____ an astronaut.