. The government has _______ the parents to work with teachers in the education of their children.
| A．asked for | B．called for | C．looked for | D．paid for |
The farmers are only allowed to cut ______ trees and cut them _______ for firewood once a year.
| A．down, up | B．up, down | C．off, across | D．down, out |
Doctors say _____ good diet is of ______ great benefit to our health.
| A．a , a | B．the, a | C．a, / | D．the, / |
Mike is a student at a famous university, _______ for a doctor degree.
| A．studied | B．studying | C．to have studied | D．to be studying |
There is a feeling in me _______ we’ll surely find a cure for Aids.
| A．that | B．which | C．of which | D．when |
__________,we must believe in ourselves and believe that we can do something well.
| A．However life is difficult | B． However is life difficult |
| C．However difficult life is | D． However difficult is life |