问题
选择题
Don't touch anything in the lab _____ your teacher tells you to.
[ ]
A. if
B. though
C. unless
D. even though
答案
答案：C
搜题请搜索小程序“爱下问搜题”
Don't touch anything in the lab _____ your teacher tells you to.
[ ]
A. if
B. though
C. unless
D. even though
答案：C