—Sir, would you mind my sitting next to you?—__________. My father will sit here in a minute.
The people in Ya'an have met lots of difficulties, but they haven't ________ hope.
It is ________ for me to follow the Australian guests because I am good at English.
––Now the air in our hometown is even_______ than it was before.––So we must do something to stop it.
--Would you like some coffee?--Yes, please. By the way, do you have any milk? I prefer coffee _______ milk.
—Oh, there’s someone knocking at the door.—_______ must be that naughty boy.