A. at
B. to
C. for
D. on
A. envy
B. hate
C. admire
D. improve
A. improves
B. improves on
C. betters
D. proves
A. Now that B. So far C. Though D. Even if
A. what B. whatever C. where D. however
A. by contrast B. by nature
C. on the whole D. on the average
A. instead of B. in addition to
C. as well as D. at the cost of
A. signs B. signals C. symbols D. marks
A. valuable B. principle C. reasonable D. superior
A. see to B. used to C. adapted to D. stuck to
A. turned into B. turned up
C. turned out D. turned off
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