No doubt, the more one is _______ the foreign language environment, the better he or she will learn the language.
| A．referred to | B．caught in |
| C．kept up | D．exposed to |
I got caught in the rain and my suit______.
| A．has ruined | B．had ruined | C．has been ruined | D．had been ruined |
Walk close ____ it and try to see if it is connected _____ our network.
| A．with; to | B．to; about | C．to; with | D．with; about |
Many world leaders ____ to reduce poverty and help the poor live better at the conference.
| A．agreed | B．accepted | C．permitted | D．allowed |
Government should make sure ____ all sculptures are kept well when removed.
| A．that | B．if | C．whether | D．how |
In America, many people waste a lot of food _____ in Africa people haven’t enough to eat.
| A．however | B．although | C．as | D．while |