Mr. Smith is not doing well; the doctor told us that his illness has _______ the health.
A. effect
B. interfered
C. undermined
D. depressed
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My parents don't object to my taking part-time jobs, but they remind me not to let them _______ my school work.
A. interfere with
B. in turn
C. contribute to
D. at risk of
Although he kept trying and failing, I always ________ the belief that he would succeed one day.
A. cut back on
B. take a toll on
C. drop out
D. hold on to
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