When _____ he leave the hospital?" I asked the doctor.
| A．will | B．shall | C．can | D．may |
We ______ last night, but we went to the concert instead.
| A．must have studied | B．might study |
| C．should have studied | D．would study |
— What does the sign over there read?
— No person ______ smoke or carry a lighted cigarette, or pipe in this area．
| A．will | B．must | C．may | D．shall |
．How long is it ______ we last spent the holiday in the country together?
| A．until | B．before | C．since | D．that |
— Can you come on Friday or Saturday?
— I’m afraid ______ is possible．I will go to the hospital to look after my friend．
| A．either | B．none | C．any | D．neither |
He wanted to join the medical team to help the victims in the earthquake but he______for his poor health．
| A．was turned up | B．was turned on | C．was turned over | D．was turned down |