The process of producing electricity may also give out CO2, _______ you heat your house with electricity instead of charcoal.
| A．even if | B．as long as | C．as if | D．as soon as |
—I'm sorry I've spilt some tea on the tablecloth.
—________；it will wash out.
| A．Never mind | B．Come on |
| C．All right | D．Go ahead |
I am so tired，for I ________ English for 2 hours.
| A．is studying | B．have been studying |
| C．was studying | D．had been studying |
—Shall we go out to the seaside this weekend?
—________ Ring me up at any time.
| A．Hold on，please. | B．What for? |
| C．That depends. | D．Sounds good. |
It was Tom ________ is a soldier ________ saved the little girl from the water yesterday.
| A．that；that | B．whose；whom |
| C．who；who | D．that；who |
The government has made laws to protect animals，so the number of the endangered animals ________ in recent years.
| A．had grown | B．grew |
| C．has grown | D．is growing |