【推荐1】Nearly every medical breakthrough in the last 100 years has ________ animal testing.

A．influenced

B．involved

C．extended

D．increased

【推荐2】With the population ________ at an alarming rate, experts are amazed that there are so many people on the planet, and ________ that there will be ten billion of us before the end of this century.

A．is increasing, predict	B．increasing, predicting
C．increasing, predict	D．to be increasing, predicted

【推荐1】 We________ to make our environment more beautiful since the time humankind started gardening.

A．try

B．are trying

C．have been trying

D．will try

【推荐2】Five doctors set up a medical team in the 1950s, since when they ________ research to seek greater understanding of the brain.

A．have been conducting

B．had conducted

C．were conducting

D．conducted

【推荐2】I believe the problem can be solved if colleges and students take ______.

A．measures

B．spirits

C．solutions

D．deeds

【推荐3】The mayor warns the public that the battle against the pollution ________ unless some strong measures ________ without delay.

A．won’t be won; are taken	B．won’t win; will be taken
C．won’t be won; taken	D．won’t win; take