The children planted more trees and flowers after they______Greener China.
| A．joined | B．took part in | C．became | D．were |
—Is the boy your own son?
—No. He is an _____ child _____ himself Martin.
| A．adopted, calling | B．adopted, called |
| C．adopting, calling | D．adopting, called |
The teacher commanded that the naughty boy _____, but he refused.
| A．stand up | B．stood up | C．would stand up | D．had stood up |
In the dark street, there wasn’t a single person she could turn for help.
| A．who | B．whom | C．that | D．to whom |
I don’t believe his dream’s come true, it?
| A．is | B．isn’t | C．has | D．hasn’t |
Climbing Mount Tai great skills and not without risk.
| A．requires; is | B．required; was | C．required; are | D．required; were |