Knowledge and learning are important if we want to be successful, but they may also ________our thinking.
A．direct B．limit C．change D．improve
The harder you ________， the better progress you ________.
A．will work; will make B．work; have made
C．work; will make D．will work; make
Professor Smith is now ________ the company, which was once________ Professor White.
A．in charge of; in charge of B．in charge of; in the charge of
C．in the charge of; in the charge of D．in the charge of; in charge of
He is an old doctor with a lot of ________. But he has never travelled by air before.Taking a plane was quite ________ experience for him this time.
A．experience; an B．experiences; an C．experience; / D．experiences; /
During her childhood Susan read a lot about Chinese history, from which she _________ greatly in her work in China now.
A．observes B．recovers C．recognises D．benefits
One Friday, we were packing to leave for a weekend away _______ my daughter heard cries for help.
A．after B．while C．as D．when
