--What do you think of the first lecture by Ms Li?--Well, it’s quite ___ and all of us are quite ___ at it.
—The trip shouldn’t take more than an hour. — ______It is at least two hours.
Can you make sure ______ the gold ring?
It is careless _______ such a mistake.
The teacher said that the sun ________ in the east and ________ in the west.
I’d appreciateif you could turn the radio down. I’m doing my homework.