问题

We often plant _______trees every year.
A:thousand
B:thousand of
C:thousands of
D:thousands
B:thousand of
C:thousands of
D:thousands
正确答案是:
同类题型
.To his great excitement, the day he looked forward to _______ at last!
Usually he writes in ink and writes _______ his left hand. [ ]
Although he failed this time, he didn’t give up and ______studying hard..
Have you returned the book to the library ____? —Yes, I have ____ returned it.
So many great events ________that it is bound to be a most special year in Chinese history.