14. It is hard to explain in words_________________.
A. what is a chemical change
B. what a chemical change is
C. how is a chemical change
D. how a chemical change is
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Look, she's so upset at what you've said! You_____________more polite.
A. should have been
B. had to
C. may be
D. would be
The visiting British Prime Minister was the person___________.
A. whom the state dinner was given in honor
B. whose honor the state dinner was given
C. in whose honor the state dinner was given
D. for whom the state dinner was given honor
He tends to take a wider, broader ____________of things than most people.
A. view
B. sight
C. scene
D. attitude
18. There are_____________contests, in which each athlete competes alone.
A. private
B. single
C. personal
D. individual
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