Do you come to South Korea for the ________ of seeing your family or doing business— I come here on business.

If Becky hadn’t missed the bus, she ______late for the lecture.

This area is rich in coal，so habitants here use tons of coal to _____ electricity.

My parents often tell me _______ too muchjunk food. It’s bad for my health.

Do you know sound travels very fast—-Yes. But light travels _______ sound.