I often see my mother ____________ chess with my father after supper.
| A．to play | B．played | C．playing | D．play |
—_________ 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 |
We are _________ by doctors to eat more natural food and take plenty of physical exercise.
| A．allowed | B．warned | C．taught | D．advised |
—Hi, Amy. Why are you so sad?
—Well, I found the computer I had had _________ went wrong again.
| A．it repair | B．repaired | C．it repaired | D．repairing |