问题
选择题
The manager didn’t turn up ______ Peter agreed to sign the contract.[ ]
A. unless
B. until
C. while
D. once
答案
答案：B
搜题请搜索小程序“爱下问搜题”
The manager didn’t turn up ______ Peter agreed to sign the contract.[ ]
A. unless
B. until
C. while
D. once
答案：B
