________ work has been done to improve the people’s living standard.
A. A large amount of B. A large number of
C. A great deal D. A great many
—When does your plane take off?
—At 3：00 p．m. tomorrow. I've just called the airport to ________ it.
A．intend B．argue C．organize D．confirm
You need to have______if you want to teach the group of naughty children well.
A.energy B.patience
C.strength D.belief
Don't worry. I'm sure things will get better .
A. in time B. on time
C. at times D. at the time
Tom was about to close the window ________ his attention was caught by a bird.
A. when B. it C. and D. till
With so many noises from the busy traffic in the street, I couldn’t______ and do my research work.
A. put down B. set down
C. cut down D. settle down
