—What was the party like?
—Wonderful. It is years________I enjoyed myself so much.
A:after
B:when
C:before
D:since
若|m+1|+n-2=0,则2m+n=( )
下列四幅图中,能正确表示地球自转方向的是( )
画一画,写一写自己喜欢的动物。
____
I like____ .
Look at____ .
It's____ (colour).
It's____ (tall/short/big…).
Its ____ is____ .
Its ____ are ____ .
23.8÷0.34=____÷34.
如图是生物圈碳一氧平衡示意图,据图分析回答: