When asked to explain __________ he did to make his students so fascinated with his lessons, the teacher paused and thought deeply.
| A．what was it that |
| B．that what it was |
| C．what it was that |
| D．what was it |
He suggests we＿＿＿＿＿＿to the cinema at once, otherwise we will be late.
| A．must go | B．go | C．will go | D．would go |
—— I can’t get through to the general manager’s office anyhow.
—— The line is busy. Someone＿＿＿＿＿the telephone.
| A．must use | B．uses | C．must have been using | D．must be using |
—— Do you still remember the day when we went to the Great Wall?
—— I can’t remember it well, but＿＿＿＿＿＿sometime last autumn?
| A．might it be | B．could it have been | C．could it be | D．must it have been |
I wish you＿＿＿＿＿＿go with me tomorrow.
| A．will | B．would | C．shall | D．can |
It’s strange that they＿＿＿＿＿nothing about this matter.
| A．know | B．would know | C．knows | D．knew |