—— It will be three months ____ we meet again.
—— Then we can keep in touch by email.
| A．since | B．as | C．before | D．after |
The doctor advised her to wear flat shoes________her back problem.
| A．on account of | B．in terms of | C．for lack of | D．on top of |
---Waiter! How soon can I get my food? I just have half an hour left before my train leaves.
---It________be ready in five minutes.
| A．may | B．should | C．could | D．need |
If the drought________in Southwest China, the crops will be ruined. Worse still, both people and animals will be threatened with a lack of drinking water.
| A．keep to | B．deeps up | C．keeps off | D．deeps down |
The present financial crisis has greatly contributed to thousands of workers________and many factories .
| A．laying off, closed down | B．laid off, closed down |
| C．laid off, closing down | D．being laid off, closing down |
Many animals sleep a lot when young, but sleep much less when they get older, just________is the case with human being.
| A．as | B．which | C．what | D．it |