—How was your recent trip to Jiuzhaigou? —I’ve never had one before.
The farmers are only allowed to cut ______ trees and cut them _______ for firewood once a year.
Doctors say _____ good diet is of ______ great benefit to our health.
Mike is a student at a famous university, _______ for a doctor degree.
There is a feeling in me _______ we’ll surely find a cure for Aids.
__________,we must believe in ourselves and believe that we can do something well.