—What were you doing at 8:00 last Sunday?
—I ______ rubbish with my classmates by Zijiang River.
A．picked up
B．am picking up
C．was picking up
（安徽）As we all know，the Silk Road________China to the West in ancient times．
| A．connects |
| B．connected |
| C．will connect |
| D．is connecting |
Our teachers are very friendly to us．We________friends since three years ago．
A．have been
B．have become
C．would be
—Jack，I have________working out the math problem．
—Don’t worry．Let me help you．
A．fun
B．trouble
C．experience
—What do you think of the environment here？
—Wonderful！________of the land________covered with trees and grass．
| A．Two fifths；is |
| B．Two fifth；is |
| C．Two fifths；are |
| D．Two fifth；are |
The baby feels________while his mother holds him in her arms．
| A．save |
| B．safe |
| C．safely |
| D．safety |