-__________ for you?
-How about next Friday?
| A．When do you think it is convenient |
| B．Do you think when it is convenient |
| C．When do you think is it convenient |
| D．Do you think when is it convenient |
"We must keep a secret of the things _______ here", the general said, _______ at the man in charge of the information office.
| A．discussed, stared seriously | B．being discussed, seriously staring |
| C．to be discussed, seriously stared | D．discussed, stared |
.China is one of the largest countries in the world, _______ 9.6 million square (平方) kilometers.
| A．to cover | B．covered | C．covers | D．covering |
The old sick lady entered the hospital, ______ her two sons.
| A．to support | B．supporting | C．supported by | D．having supported |
_______ many times, he still couldn't understand.
| A．Having been told | B．Having told | C．He having been told | D．telling |
Many things _______ impossible in the past are very common today.
| A．consider | B．considering | C．considered | D．be considered |