Someone called me up in the middle of the night, but he hung up ______ I could answer the phone.
| A．as | B．since | C．until | D．before |
I’m afraid by the time you arrive this afternoon I_______ a lesson then.
| A．had | B．are having | C．have had | D．will be having |
In the good care of the nurses, the patient is ____recovering from the heart operation
| A．quietly | B．actually | C．gradually | D．practically |
A modern teaching building has been set up in ______ was a wasteland ten years ago.
| A．what | B．which | C．that | D．where |
The result might not as satisfactory as expected but the ________ on his face told us that he was very happy.
| A．expression | B．impression | C．celebration | D．appearance |
______ to as much English as possible is a good way to learn English well.
| A．Exposed | B．Being exposed | C．Having exposed | D．To expose |