问题

The school rules state that no child shall be allowed out of the school during the day,__________ accompanied by an adult[ ]

A: once
B: when
C: if
D: unless

正确答案是：

同类题型

Li Qiang is_____ honest boy. He wants to be_____useful person when he grows up

Mr. Smith, _______ of the ______ speech, started to read a novel.

.—–I_____ asleep while I was reading.——-It doesn’t matter.

Henry, take this seat, ________ you’ll have to stand watching the game

I want to do thistime .