Green tea, many experts suggest, should be drunk regularly to improve health.
—You look a bit worried.What has happened? —So I do.You see,the computer I got ________ yesterday doesn’t work again.
This street is very crowded at this time of day.You have to be very cautious while ______.
--- When shall I pay the bill? ---Don’t mind it, sir.__________.
The reason why Malaysia Airline Flight370 disappeared remained_____.
Some of my workmates prefer to send to our QQ group ______ news they got.