Choose the correct choice among A, B, C or D to complete the following sentences Question 37. The test is not ___________________ A. as difficult as it was last month.                B. so difficult as it was last month        C. more difficult as it was last month.          D. Both A & B are correct        Question 38. The boy always does his homework before class _______. A. so as not to be punished by the teacher     B. so as to be punished by the teacher C. so that not to be punished by the teacher   D. in order that not to be punished by the teacher Question 39. People will respect and try to protect the environment ________________ . A. if they are aware of the importance of  environment. B. if  they are aware of importance of the environment. C. if they are aware of the importance of  the environment. D. because  they are aware of the importance of the environment. Question 40. The wind power can ___________________________ A. be used to generating electricity                        B. be used to generate electricity C. be used to generate electricity                                        D. used to generate electricity