I’ve _____ all my papers but I still can’t find the contract.
| A．looked into | B．looked up | C．looked through | D．looked after |
Our bad living habits will destroy the earth.Only by changing________we live can we save the earth.
| A．that | B．what |
| C．how | D．where |
It was only when I reread his poems recently________I began to appreciate their beauty.
| A．until | B．that |
| C．then | D．so |
I got an email from my old friend last Sunday.Until then，we________in touch for nearly 3 years.
| A．didn’t get | B．haven’t got |
| C．hadn’t got | D．don’t get |
Many people believe that hunger is only a problem in the developing countries.________，it is a problem all over the world.
| A．For one thing | B．In addition |
| C．As well | D．On the contrary |
Born into a family with three brothers，David was________to value the sense of sharing.
| A．brought up | B．turned down |
| C．looked after | D．held back |