A sudden blizzard occurred in Beijing last night，__________ great in-convenience in transport.
| A．caused | B．causing |
| C．affecting | D．brought |
—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 |
The teacher will never have Tom away within the exam.
| A．get; cheat | B．to get; cheating |
| C．getting; cheating | D．getting; to cheat |
The two sisters are ________ different in character --- one talks a lot while the other is a girl of few words.
| A．exactly | B．entirely |
| C．frequently | D．finally |
He has been in bed ______ he fell off his bike a week ago.
| A．even if | B．soon after |
| C．now that | D．ever since |
The letter he had been looking forward to________at last this morning.
| A．come | B．comes | C．coming | D．came |