Here _____a set of keys.The keys _____Bob’s.
________ of the city was covered with the heavy smog.
---Can you come on Monday or Tuesday, John?---I’m afraid _______ day is possible. I will be very busy on those two days.
We’ve decided to decorate our new flat by ______ this weekend.
_____March 20____26, the US first lady Michelle Obama was on a trip to China with her daughters and mother.
Hurry up! If we miss ______ last bus, we’ll have to get home by______ taxi.