Jane had just finished her homework ________ her mom asked her to practice playing the violin yesterday.
| A．when | B．while | C．after | D．before |
At the opening ceremony, the chairman ______ a speech to welcome the guests from more than twenty centuries.
| A．delivered | B．spoke | C．said | D．stated |
Happy birthday, Alice? So you have _______ twenty-one already?
| A．become | B．turned | C．grown | D．passed |
The conventional viewthat the Mars’ atmosphere is very poor because the planet lacks a magnetic field.
| A．covers | B．holds | C．possesses | D．contains |
―Is that Miss Liu having dinner over there?
―Itbe her. She has gone to New York for an important business meeting.
| A．mustn’t | B．needn’t | C．can’t | D．shouldn’t |
We are working on the _assumption__________that everyone _________ will turn up.
| A．assumption; invited | B．regulation; inviting |
| C．constitution; invited | D．expectation; inviting |