Before the first non-stop flight made in 1949, it ________ necessary for all planes
A. would be
B. has been
C. had been
D. would have been
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According to Scheetz’s statement （Lines 4-5. Para. 4）, companies prefer ________.
A. people who have a strategic mind
B. people who are talented in fine arts
C. people who are ambitious and aggressive
D. people who have received training in mechanics
After the robbery, the shop installed a sophisticate alarm system as an insurance ________ further losses.
A. for
B. from
C. against
D. towards
A) Thus B) However C) Indeed D) Moreover
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