1. The sun           (go) down earlier in winter than in summer.
2. I _____ (write) a letter to my pen-friend yesterday.
3. Miss Gao _____ (teach) the students to sing an English song now.
4. The Greens _____ (stay) at home next Friday.
5. He _____ (tell) to return his book to the library yesterday morning.
6. I' d like you _____ (meet) my parents tomorrow evening.
7. There _____ (be) a lot of great changes in China since 1949.
8. The fridge is used for _____ (keep) food fresh.

1. I _______ (have) an exciting party last weekend.
2. _______ she _______ (practice) her guitar yesterday?
    No, she ________.
3. What ________ Tom ________ (do) on Saturday evening?
    He ________ (watch) TV and _______ (read) an interesting book.
4. They all ________ (go) to the mountains yesterday morning.
5. She ________ (not visit) her aunt last weekend.
    She ________ (stay) at home and _______ (do) some cleaning.
6. When ________ you ________ (write) this song?
    I ________ (write) it last year.
7. My friend, Carol, ________ (study) for the math test and ________ (practice) English last night.
8. _______ Mr. Li ________ (do) the project on Monday morning? Yes, he _______.
9. How ________ (be) Jim's weekend? It _______ (be not) bad.
10. _______ (be) your mother a sales assistant last year? No. she _______.