1) He failed the exam ______ because he wasn’t hardworking enough.(part)
2) Her ________ is a magnet and it makes her ________.(laugh,attract)
3) All the people living in _______ in the world is what we wish (peaceful)
4) Please keep ________ (silence) The teacher is giving a speech.
5) Human is thinking about ______ (explore) the Mars.
6) You had better ________ (approach) the dying snake carefully.
7) The room is full of ______ (laugh) and ________ (happy)
8) The speaker made the audience r_____ (roar) with _____ (laugh)
9) The last student ________ (leave) is responsible for switching off the lights.
10) He lied on the grass _______ (lazy),enjoying the ________ (peace) lake.
11) Children dreamed to _____ (开发) the planet in the near future.
12)don't use the lift when you escape from a high___during a fire.