___in the queue for half an hour,the old man suddenly realized he had left the cheque in the car
| A．Waiting |
| B．To wait |
| C．Having waited |
| D．To have waited |
—Li Ming is said ________ abroad.Do you know what country he will study in?
—Yes, in London.
| A．to have studied | B．to study |
| C．to be studying | D．to have been studying |
She is very dear to us.We have been prepared to do ________ it takes to save her life.
| A．whichever | B．however |
| C．whatever | D．whoever |
Today, we will begin ________ we stopped yesterday so that no point will be left out.
| A．when | B．where | C．how | D．what |
________， please try your best to solve the problem in time.
| A．Ought you get into trouble |
| B．Must you get into trouble |
| C．Can you get into trouble |
| D．Should you get into trouble |
In freezing weather, snow can turn into ice, which is easy to ________.
| A．be slipped | B．slip |
| C．slip on | D．be slipping |