The little girl is not quite confident ____ her ability to go to a key university and she is very sensitive _____ anything concerned with it.[ ]

Most students like the teachersunderstand them well.

She bought the same skirt at a lower price at the sameshop where I bought mine because she was a __________ customer.

By the time she went outside, the bus ____already ______ .

He was the first Chinese pianist in the history of the competition to win this prize.