Learning a musical _____will enrich your life and give your greater insight .
A. tool
B. play
C. instrument
D. instruction
He flew to New York on some _____business,and he won't be back until next week .
A. urgent
B. effective
C. efficient
D. urban
Due to the transport delay,we didn't meet the ____
A. requirement
B. deadline
C. dead end
D. straight line
We came across a former _____at a concert .
A. college
B. colleague
C. collegiate
D. collection
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