—Who______ it be that is knocking at the door?
—It ______ be Father, but I’m not sure.
| A．can; must | B．can; may |
| C．must; can | D．may; must |
Your friends were all worried about _______ you were sick.
| A．that | B．which | C．what | D．the fact that |
The audience were so ______ by his humorous performance that they kept laughing all the time.
| A．moved | B．frightened | C．entertained | D．shocked |
When the market economy is introduced, many factories will not .
| A．live | B．last | C．survive | D．keep |
“___________ the election is over,” said Powell, “the time has come for me to step down as secretary of state and return to private life.”
| A．Now that | B．In case | C．So long as | D．As far as |
—Having many helpers makes a task easier and faster to complete.
—I think so. _______ .
| A．Many hands make light work |
| B．All is well that ends well. |
| C．The early bird catch the worm |
| D．The more you learn, the more you know |