用所给动词的适当形式填空.(必要时可加助动词或情态动词)。

     David is from America. He (1)______ (live) in China with his parents now. He can (2)______ (speak) Chinese well. His parents (3)________(be) both teachers. They (4)_____(teach) English at No. 1 Middle School. They like (5)_______(work) in China very much.

     On weekdays, David (6)_____(get) up at half past six. He (7)_______(have) breakfast and then(8)________(go) to school. At weekends, he (9)_________(not have) any lessons, and he often plays football

with his friends. They are good at (10)_____(play) it.

     David works hard at his lessons and all the teachers like him very much.

现阶段中国已经实现了粮食基本自给，在未来的发展过程中，中国依靠自己的力量实现粮食基本自给，客观上具备诸多有利因素。根据中国农业自然资源、生产条件、技术水平和其他发展条件，粮食增产潜力很大。