问题

22．Collecting stamps as a hobby___________ increasingly popular during the past fifty years

A:becomes
B:became
C:has become
D:had become

正确答案是：

同类题型

Lily is coming by plane tomorrow.——Let’s go to airport to meet her.

Besides being able to walk on for three days without drinking, camels can also live for a long time ______ small quantities of food

In my opinion, hard work is as important as, ______ an efficient way in study. [ ]

下列句中古诗句不符合语境的一项是（）

I expect D．was expected