冀教版九年级全册Lesson 27 Planet Danny同步练习卷(含答案).doc
冀教版九年级全册《Lesson 27 Planet Danny》同步练习卷
一、Step 1: Review (知识和回顾)
1.let's (做一个实验).
2.I a jar water ( 用…装满 )
3.I cover the top with a piece of cardboard.( 变被动 )
4.The force of the air is ( 足够强大 ) to keep the water in the jar.
5.k...