( )（4）Hi, I’m Sam. A.你好，我叫\山姆。 B.你是山姆吗？
Ma Liang _____ a paintbrush.A. has B. have C. had
_____ people invented paper.A. English B. Chinese C. American
Daming _____ his trousers yesterday.A. washes B. washing C. washed
Yesterday I _____ my bedroom.A. clean B. cleaned C. cleans
选择并改错，把错误的一项圈起来，在句子后来改正。
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