1£®Young though/as he is, he has been to many countries.

2£®If she finishes(finish) work early£¬she will be allowed to watch TV.

3£®However hard the condition is, you must work harder.

4£®Unless you've experienced it, you can't understand how I felt.

5£®While/Although/Though I admit that there are problems, I don't agree that they cannot be solved.

6£®As long as you work hard, you will succeed(succeed) sooner or later.

7£®She won't lose weight unless she keeps a diet and takes exercise every day.

8£®—Would you like to go fishing with me tomorrow?

—Provided/Providing(provide) that you give me a lift in your car.

9£®You'd better take a magazine in case you have to wait for a long time.

10£®While the news, up to now, has been good£¬there may be bad days ahead.