The price of fruit has increased recently ______ the price of vegetables has gone down.
A. when
B. while
C. whereas
D. otherwise
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They failed to pass the exam last time; I regretted______.
A. to be not able to help them
B. being unable to help them
C. being not able to helping them
D. not be able to help them
The study was conducted on a local scale and was independent ______ the central government.
A. on
B. against
C. from
D. of
Some people say the need for cars______by the year 2004.
A. will have doubled
B. had doubled
C. will be doubling
D. be doubled
I' 11______that I' m a qualified engineer.
A. have you know
B. have known you
C. have you knowing
D. have you known
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