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1.When carbon is added to iron in proper ________ the result is steel.
A) rates
B) thicknesses
C) proportions
D) densities
2.You should try to ________ your ambition and be more realistic.
A) reserve
B) restrain
C) retain
D) replace
3.Nancy is only a sort of ________ of her husband’s opinion and has no ideas of her own.
A) sample
B) reproduction
C) shadow
D) echo
4.Now that spring is here, you can ________ these fur coats till you need them again next winter.
A) put over
B) put away
C) put off
D) put down
5.There is a ________ of impatience in the tone of his voice.
A) hint
B) notion
C) dot
D) phrase
