英语选择题5题,请给正确答案..

英语选择题5题,请给正确答案..
The medicine is on sale everywhere. You can get it at _______ chemist’s.
A. each
B. some
C. certain
D. any
The people at the party were worried about Janet because no one was aware ________ she had gone.
A. where that
B. of where
C. of the place
D. the place
The driver might have ______the accident if he had had his headlights on.
A. missed
B. avoided
C. stopped
D. dismissed
The government is trying to do something to _______ better understanding between the two countries.
A. raise
B. promote
C. heighten
D. increase
He was ________ enough to understand my questions from the gestures I made.
A. intelligent
B. efficient
C. proficient
D. diligent

请帮解答,谢谢.