句型转换（每空一词）。

1. The students took the bus back to school after lunch. (改为同义句)

    After lunch the students                  back to school                 bus.

2. The boys in Grade Six had a great time at the zoo. (改为同义句)

    The boys in Grade Six                 at the zoo.

3. What else do you need for the dinner?(改为同义句)

                                                         do you need for the dinner?

4. Let's go for a swim next Sunday.(改为同义句)

    Let s                 next Sunday.

5. The twin brothers were at the aquarium half an hour ago. (对画线部分提问)

                     the twin brothers half an hour ago?

火炬分液罐罐底泵齿轮油添加时必须添加至观察窗的1/2~2/3位置。