－Would you like to go swimming with me?
－I’d like to, __________I’m too busy.
A. and B. if C. but
We should try our best to help the animals _______.
| A．in dangerous | B．danger | C．in danger | D．dangerous |
Uncle Wang is_____ the barber’s at the moment, so you have to talk to him _____ the phone.
| A．in; in | B．at; on | C．on; at | D．at; at |
－Mom, where’s my backpack?
－You shouldn’t put your things casually, you should take good care of _____ own things.
| A．yours | B．you | C．your | D．your’s |
My brother is studying in ______ university in America; he wants to be ______ astronaut in the future.
| A．a; a | B．a; an | C．an; a | D．an; an |
Now there are already robots _________ in factories.
| A．working | B．to work | C．work | D．worked |