用括号内所给动词的适当形式填空。 1. Listen!The girl________(sing) in the room. 2. What time________your mother________(go) to work every day? 3. May I________(borrow) your eraser? 4. Mrs Black________(not work) in the factory. 5. Tom usually________(come) to school at seven in the morning. 6. Jack________(swim) in the river now. 7. ________(be) there any milk in the cup? 8. The students________(have) an English class yesterday. 9. — What are you doing? — I________(mend) the bike. 10. Sue________(clean) the windows every day.