1£®He accidentally let out that he had quarreled with  his wife and that he hadn't been home for a couple of weeks.

2£®The price of the house is reasonable and I love its garden in particular.We can grow flowers and vegetables there.

3£®They have several plans under way to achieve our aim of keeping the river clean.

4£®I much appreciate hearing(hear) timely reports£¬telling(tell)me about the progress of our new project while I was away abroad.

5£®—Why did you give the waitress a gift?

—To show my appreciation(appreciate)for her good service.