1._______ the air is cleaner ; people will have less breathing problems
A.Unless B. When C.If D . Because
2.He will _______ some pictures with his camera
A. takes B, taking C . take D. to take
3. Which girl is _______ , Mary or Daisy ?
A. intelligent B.more intelligent C the intelligentest D most intelligent
4. Mai always _______ her Mom with the housework after school
A. help B helps C helping D. to help
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