It’s a long time______ they separated,but it won’t be long_____ they meet again．
| A．since; before | B．after; when |
| C．since; when | D．after; before |
Although this medicine can cure you ______ your illness, it has a bad effect ______ you.
| A．for; on | B．of; on | C．of; at | D．for; in |
After he graduated from college, he _______ his father’s business.
| A．took in | B．took up | C．took over | D．took on |
Both rice and wheat _______ grown in our country.
| A．is | B．are | C．was | D．were |
I, who ______ your close friend, will try my best to help you out of trouble.
| A．am | B．is | C．are | D．be |
______ everything ______, she left the supermarket with satisfaction.
| A．As; buying | B．For; to buy | C．With; bought | D．Because; to buy |