Her smile _____ him that she was happy.
A. exhausted
B. ensured
C. endured
D. convinced
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My responsibility is to _____ that no students cheat on the exam.
A. relieve
B. convince
C. ensure
D. soar
The success of the event requires _____ effort on the part of many volunteers.
A. authentic
B. mature
C. relevant
D. tremendous
_____ Beijing roast duck is most popular with tourists when they visit Beijing.
A. authentic
B. envious
C. financial
D. mature
I don't need all the material. Just give me the _____ documents of his work experience.
A. relevant
B. tremendous
C. advanced
D. mature