---Excuse me, Mum. When can we have dinner?
---Not until it ___________ in half an hour.
| A．is prepared | B．will be prepared |
| C．has been prepared | D．was prepared |
The doctor told him that he should take a holiday to relax himself, but _________ didn’t help.
| A．which | B．that | C．it | D．he |
—Who would you like to talk with at the end of the speech?
—The lady _________ Miss White.
| A． we call | B．called herself | C．calls herself | D．is called |
—_________ you _________ the terrible news about Libya?
—Yes, I _________ it this morning. The people there will suffer from the war.
| A．Do, watch; have done | B．Did, watch; did |
| C．Have, watched; did | D．Had, watched; will do |
Many people believe we will face environmental disasters _________ we completely change the way we live.
| A．but | B．though | C．unless | D．until |
—Have you decided when to leave for Australia?
—Not yet. We _________ set off at the end of this month.
| A．must | B．should | C．need | D．may |