The children do not know how to _______ themselves decently at the party.
| A．act | B．perform | C．behave | D．advance |
—Does he like tea or coffee?—Sorry. I don’t know ______ he prefers.
| A．which | B．that | C．how | D．what |
_______, a learned man makes fewer mistakes in life than a man without knowledge.
| A．In general | B．As general |
| C．On general | D．At general |
“It’s raining too heavily at this moment,” said the old woman, ________ out of the window.
| A．to look | B．looking |
| C．having looked | D．looked |
It is very ______ that she will ring me tonight.
| A．likely | B．possibly |
| C．probably | D．perhaps |
—I’m afraid I have to leave for New York tomorrow.
—_____
| A．I’m afraid not. |
| B．Have a good journey. |
| C．Please do. |
| D．Why not go now? |