从出苗到第一个棉铃成熟吐絮，叫生育期，为（）天左右。
A、100
B、130
C、180
D、210
参考答案：B
The rainstorm killed __________ people at year.
A．two thousand
B．two thousands
C．two thousand of
D．two thousands of
I find _______ necessary to take some warm and dry clothes with us during the walk.
A．it
B．which
C．that
D．What
