He looked up his number in the phone book to_____that she got it right

题目

He looked up his number in the phone book to_____that she got it right
A.work out
B.try out
c.make sure
说出理由

答案

选C
A是解决的意思
B是尝试的意思
C是确保的意思、他翻查电话簿中的电话以确保她得到的是正确的号码.