用适当的介词或副词填空。

1. He cut the apple____halves.

2. They had a pleasant chat____coffee.

3. What time is it __your watch?

4. We can't go out____a result of the bad weather.

5.I don't agree with you____the price of the house.

6. The reason____his coming late is that he missed the bus.

7. His carelessness led____his failure.

8. Sorry,I didn't____understand you.

9. They were just in time____the bus.

10. We must concentrate our efforts____improving education.