Don’t answer the phone when the cell phone is being charged, for it ________ be very dangerous sometimes.
| A．shall | B．should | C．can | D．must |
When a pencil is partly in a glass of water, it looks as if ＿＿＿＿.
| A．breaks | B．has broken | C．were broken | D．had been broken |
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 |
It’s strange that they＿＿＿＿＿nothing about this matter.
| A．know | B．would know | C．knows | D．knew |