This study has found some key factors ____employee's stress in their work.
A. turning down
B. leading to
C. taking off
D. carrying out
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The company can now focus its attention _______developing its latest car model.
A. in
B. with
C. at
D. on
If Mary had ______the situation to Tom, he would have understood it.
A. supplied
B. explained
C. charged
D. thrown
I'm pleased to receive your letter of April 10th, ____for our catalogue and price-list.
A. ask
B. asked
C. to ask
D. asking
____your trip is short or long, we can work out a schedule for you.
A. Whether
B. What
C. How
D. Which