A. find
B. finding
C. to find
D. to finding
A. is building
B. is being built
C. build
D. was built
A. save
B. to save
C. saving
D. saved
A. was told waiting
B. was telling to be waited
C. was told to wait
D. was told to be waited
A. for
B. in
C. on
D. with
A. constant
B. flexible
C. polluted
D. valuable
A. or
B. and
C. for
D. with
A. If
B. Unless
C. Whether
D. In case
A. on
B. up
C. for
D. of
A. will run
B. running
C. has run
D. would run
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