There is a greater incidence of cancer in the families of radiation workers.
A. rate
B. increase
C. decrease
D. evidence
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Removing the debris could cause the rest of the building to come tumbling down.
A. slowing
B. falling
C. turning
D. putting
I tried to conceal my surprise when she told me her age.
A. hide
B. reveal
C. show
D. express
I cannot conceive what it must be like.
A. suggest
B. think
C. imagine
D. admire
She seemed unfamiliar with the concept that everyone should have an equal opportunity.
A. definition
B. idea
C. authority
D. identity