问题

Do you think necessary to do a bird count ?Yes , we must count them at least once a year
A:it
B:that
C:we
D:they
B:that
C:we
D:they
正确答案是:
同类题型
The sentence structure of “Teachers ask me to finish the homework on time” is ____________.
______ is this? Is it a ruler?—Yes, it is a red ruler.
We often go to school ______ seven ______ the morning. [ ]
Look, what’s _____ the tree?—A bird. It is _____there.
Look at the girl! Is it Susan? —No, it __________ be her. She has gone back to her hometown.