13.--Would you like to ride bicycles with us tomorrow?
--Yes,I'll go_____ I'm free.( )
--Yes,I'll go_____ I'm free.( )
| A. | because | B. | when | C. | if |
12.The old man warned us_____ here,it's dangerous.( )
| A. | swim | B. | not to swim | C. | not swim |
11.Michael was watching TV_____ his father came in.( )
| A. | when | B. | while | C. | as soon as |
10.--I heard the high-speed train betweenB eijing and Tianjin ran_____ 350kilometers a hour.
--That's right.I'm looking forward to _____it one day.( )
--That's right.I'm looking forward to _____it one day.( )
| A. | at; take | B. | at; taking | C. | by; take |
9.Look at these pictures carefully,and decide which sentence is right.( )

| A. | Coke is as cheap as orange juice. | |
| B. | Milk is cheaper than orange juice. | |
| C. | Orange juice is not so cheap as coke. |
7.Diaoyu Island(岛) lies _____the northeast of China and Taiwan Island is ____the southeast of China.They are both parts of China.( )
| A. | in; on | B. | on; in | C. | in; in |
6.--Why are you angry with your boss?
--Because he often_ ____us _____long time but doesn't pay us more.( )
--Because he often_ ____us _____long time but doesn't pay us more.( )
| A. | make; to work | B. | makes; work | C. | makes; to work |
5.Lily feels very excited _____they will have a trip to Mount Wuyi this Sunday.( )
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| A. | even though | B. | because | C. | because of |