To ____ nature is to help ourselves, or we will be punished.
A. protect B. prevent C. provide D. pollute
The panda isn’t _____to go through the hole.
A. enough fat B. enough thin C. thin enough D. fat enough
You should keep your eyes _____ when you do eye exercises.
A. close B. open C. closed D. opened
---Mom, there is little milk,______?
---No,there isn’t. Could you please go and buy some?
A. is there B. isn’t there
C. is it D. isn’t it
If you can’t read the new words, you may __ in the dictionary.
A. look it up B. look up it
C. look them up D. look up them
–I feel tired and sleepy.
–Why not stop __________?
A. to relax B. breaking C. resting D. to work
