问题
My sister isn’t in. ________ she comes back, I’ll let her call you back.
A:While
B:Until
C:Before
D:When
B:Until
C:Before
D:When
正确答案是：
同类题型
What _______ you do if you _______ 5 million yuan?— I’d travel around the world.
When did you ____ the top of the mountain?—At 11;45 a.m.
Mr. Smith, would you please speak a little more __________?— Sorry! I thought you would follow me.
Who will _______ the baby when your aunt is away?—Nobody but me.