We didn't go home ______ the old man was sent to the hospital. A. until B. when C. while
It is reported that the sandstorm is moving _______ the south year after year.
— Excuse me, could you tell me _______?— There’s an e-shop on the third floor. You can make it there.
— May we leave the classroom now?— No, you _______. You _______ to leave until the bell rings.
— Why don’t you choose the red tie?— For me, it doesn’t _______ my shirt very well.
_______ of the materials I listened to at the beginning of the exam _______ easy.