51.
A. offer
B. offered
C. will offer
D. has offered
52.
A. funding
B. providing
C. paying
D. charging
53.
A. build
B. use
C. become
D. do
54.
A. in
B. at
C. on
D. by
55.
A. before
B. ago
C. after
D. later
56.
A. found
B. produced
C. positioned
D. located
57.
A. with
B. for
C. about
D. above
58.
A. results in
B. gives rise to
C. is due to
D. causes
59.
A. be made from
B. consist of
C. consist in
D. be consisted of
60.
A. spend
B. gain
C. give
D. cost
61.
A. offered
B. called
C. used
D. turned
62.
A. officials
B. countries
C. organization
D. agreement
63.
A. /
B. the satellite
C. the satellites
D. satellites
64.
A. speed
B. direction
C. distance
D. location
65.
A. send
B. let
C. allow
D. transmit