用所给单词的适当形式填空

【1】I can see some sheep ______ (eat) grass on the hill.

【2】His ______ (ill) resulted from bad food.

【3】Linda ______ (visit) the Science Museum next Sunday.

【4】Mr Huang ______ (teach) us English two years ago.

【5】Mr Green ______ (live) in Beijing since he came to China.

【6】The Kings ______ (watch) TV at this time last night.

【7】Tony will come to my birthday party if it ______ (not rain) tomorrow.

【8】There are many trees on both ______ (side) of the road.

【9】Be sure ______ (tell) me all the news.

【10】Listen! Who ______ (play) the piano in the next room?

【11】Mike ______ (become) a worker in the factory in 1998. He ______ (work) there since then.

【12】—When ______ you ______ (buy) the car?

—In 1998.

【13】We'll go for a picnic if it ______ (not rain) this weekend.

【14】—Where's Li Hua?

—Look! He ______ (play) tennis on the playground.

【15】He is very hungry. He ______ (not eat) anything for three days.

【16】What ______ (happen) in the world in 100 years' time?

【17】The students ______ (talk) about an action movie when the teacher came in.

【18】He ______ (go) swimming in the river every day in summer.

【19】It ______ (rain) heavily. You'd better not go out now.

【20】I ______ (watch) TV at this time yesterday.