99.The results are hardly ____.he cannot believe they are accurate.
A) credible
B) contrary
C) critical
D) crucial
100.This new laser printer is ____ with all leading software.
A) comparable
B) competitive
C) compatible
D) cooperative
101.The ball ____ two or three times before rolling down the slope.
A) swayed
B) bounced
C) hopped
D) darted
102.He raised his eyebrows and stuck his head forward and ____ it in a single nod,a gesture boys used then for O.K. when they were pleased.
A) shrugged
B) tugged
C) jerked
D) twisted
103.Many types of rock are ____ from volcanoes as solid,fragmentary material.
A) flung
B) propelled
C) ejected
D) injected
104. With prices ____ so much,it is difficult for the school to plan a budget.
A) vibration
B) fluctuating
C) fluttering
D) swinging
105.The person who ____ this type of approach for doing research deserves our praise.
A) originated
B) speculated
C) generated
D) manufactured
106.____ that the demand for power continues to rise at the current rate,it will not be long before traditional sources become inadequate.
A) Concerning
B) Ascertaining
C) Assuming
D) Regarding