25. Many parents find it hard to _______ to their children when they are teenagers.

23.—How did you find the lecture tonight？
—It ____ me. I doubt if I will come for his lecture next time.

13. -- Now, where is my purse?
--________! We’ll be late for the bus.

12.--I ____ becoming an astronaut (宇航員) when I was at school.
-- Really? Do you still think it will ____ ?

11.A man so difficult to ____ must be hard to ____ .

10. A heavy snow____ a harvest year.

3. The United Nations was supposed to ___________ the role of global peace-keep.

—Where have you been all day?
—I _______ some former classmates and I couldn’t get back until it was dark.

Don’t refer to the dictionary every time you come across a new word as sometimes its meaning may be _______ clearly in a given context.

9. Please ______ your sister to bring the ticket for the concert.