单项选择题

A man has to make ______ for his old age by putting aside enough money to live on when old.

A. supply
B. assurance
C. provision
D. storage
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单项选择题
The jeweler assured Mr. White that the stone was a(n) ______ diamond and not an imitation.
A. graceful
B. genuine
C. actual
D. exact
单项选择题
He ______ so much work that he couldn’t really do it efficiently.
A. put on
B. brought on
C. took on
D. carried on
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