Babies are interested in ______ they find and are likely to put it into their mouths.
| A．no matter what | B．no matter which | C．whatever | D．whichever |
The computer system suddenly_____ while he was searching for information on the Internet.
| A．broke out | B．broke up |
| C．broke in | D．broke down |
-----How far apart do Tom and Jack live?
-----______I know, they live in the same neighborhood.
| A．As long as | B．As well as |
| C．As far as | D．As often as |
-----Would you please repeat it?
-----Obviously, you _____me.
| A．hadn’t listened to | B．were not listening to |
| C．haven’t listened to | D．don’t listen to |
_____ I admit that all these problems are difficult, I don’t agree that they cannot be solved.
| A．Unless | B．While | C．Until | D．Since |
Having quarreled seriously three times, they have ______ and become best friends again.
| A．turned up | B．put up | C．brought up | D．made up |