Rumors were already beginning to ______ that the project might have to be abandoned.
A. calculate
B. speculate
C. circulate
D. regulate
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Not only ______ the gift, he also severely criticized the sender.
A. he refused
B. refused he
C. did he refuse
D. he did refuse
You can exercise your imagination, but these exercises must be done in accordance with the requirements ______ in the instructions.
A. set down
B. set up
C. set about
D. set off
An unlimited arms race ______ well increase the danger of war.
A. may
B. can
C. must
D. will
In a(n) ______ universe filled with stars, every line of sight should eventually meet the surface of a star.
A. eternal
B. infinite
C. ceaseless
D. everlasting