7.I am doing my homework now.(用last night改写:I was doing my homework last night）
8.My father made (a kite) last spring.（对括号部分进行提问what did my father make last spring?）
9.He didn't come here this morning.(改为肯定句He did(表示强调) come here this morning.）
10.My father worked hard.（改为一般疑问句Did your father work hard?）
11.Last night they played basketball for (an hour).(对括号部分进行提问How long did they play basketball last night?）