Look!Here comes our school bus. No hurry.Don't get on it stops. a.till b.after c.since d.when
问题描述：
Look!Here comes our school bus. No hurry.Don't get on it stops. a.till b.after c.since d.when
答
A
not ..till/until表示“直到……才……”
意思是“不要着急，等车停下再上车”
答
a
看我们的校车来了,别急,直到它停下来再上车.