一Professor Li, ______the student start at once or wait a while? 一At once.
He had to pause from time to time to wipe the sweat from his forehead, because the air-conditioning system _________.
The new stadium being built for the next Asian Games will be ______ the present one.
If you go to Xi’an, you will find the palaces there more magnificent than commonly ______.
—What do you think of his opinion?—None has given me ___________ piece of advice.
The visiting professor gave us some advice,________ of great help to our English learning.