题目内容

The police haven’t been able to __________ the mysterious bank robbery.

A. solve
B. solution
C. answer
D. settle with

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Children learn from their __________.

A. weaknesses
B. faults
C. mistakes
D. responses

It is __________ that he hasn’t come to the party.

A. anxious
B. curious
C. anxiously
D. curiously

Speech is __________; silence is ________.

A. silver; copper
B. gold; copper
C. silver; gold
D. dollar; gold

The word is on the tip of my __________.

A. speech
B. language
C. tongue
D. foot

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