The river will be dirtier and dirtier________we do nothing to protect them．
| A．since |
| B．if |
| C．unless |
| D．until |
Read the_________ carefully. They will help you know how to use the popper.
A. instructions B. decisions C. results
The book might be my sister’s. Hemingway is________ favorite author.
A. his B. her C. my
I’m really __________ playing ping-pong. No one can beat me in my class.
| A．good at | B．good for | C．busy with | D．angry with |
– Wow! Her English is getting _________. – Yes, she practices every day.
| A．very well | B．quite good | C．so nice | D．better |
– I heard that Jackie Chan would come here tomorrow. – That’s great. I’m really _______ about it.
| A．nervous | B．worried | C．excited | D．pleased |