passpadi

2018

English

67ca00ce0c643c71d77dee1f

After so many trials, the experiment __________

A.

paid up

B.

paid for

C.

paid out

D.

paid off

Correct Answer: paid off

Explanation

Paid off means to become worthwhile or to produce a benefit.

Paid off means to become worthwhile or to produce a benefit.
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