In our zeal for progress we should not _______ executive with more power.
A. avoid
B. give
C. enhance
D. arm
The mobile phone _____ several times before she answered it.
A. was ringing
B. has rung
C. had rung
D. would ring
His boss _____ an explanation of his conduct with his colleagues.
A. called up
B. called upon
C. called for
D. called off (more…)