Over 20 countries joined to search _________ Flight MH370 in the southern Indian Ocean.

The soft music sounds ________. We are all listening ________. 

--- Is John an ________ boy? --- Yes, he never tells lies.

—Be careful not to _______ anything behind. —Thanks. I have everything in my bag.

In my school, we can’t be late for school and we can’t eat in class ______.