[ Preposition ]
The practice of using more chemicals to improve crop yields is harmful ………… people’s health
A. with
B. to
C. about
D. under

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Grammar › View I am sure it is not true.
A. This must be
B. This may be
C. This can’t be
D. This shouldn’t be
Grammar › View
All of the following are how you can ask someone for favour except:
A. Can I ask you to do …?
B. Is it okay if I ask you to …?
C. Shouldn’t you let me …?
D. Would you mind doing …?