Many other inventors had experimented with electric lights before Edison.

People have experimented on animals in order to develop new drugs, improve the success rate of surgeries and so on.

Before the drug is used on human beings, experts have to ______ dogs. A: be experimented B: experiment C: experiment with D: experiment on

I have found that the community has ( ) great changes since I was here last. A: undergone B: experimented C: sustained D: submitted

I have found that the community has _______ great changes since I was here last time. A: submitted B: undergone C: sustained D: experimented

I<br/>have found that the community has _____ great changes since I was<br/>here last. A: undergone B: submitted C: sustained D: experimented

Of the following statements, ______ is NOT correct about Virginia Woolf. A: She was a central figure of the “Bloomsbury Group”. B: She experimented with stream of consciousness. C: She was an influential feminist. D: Her masterpiece was The Rainbow.

In London, how does they solve the problem of the traffic congestion() A: They take a completely-free bus service. B: They experimented a very cheap bus service. C: Part of the street is for buses only. D: They closed the streets to cars.

The attempt to help blind people to see with sound ________. A: was similar to the sound location system of the bats B: led to a product that sent out sound waves of about 20,000 cycles per second C: was experimented on a submarine D: turned out to be a failure

Which of the following statements is NOT a reason for the Rolling Stone’s long-lasting popularity? A: They brought blues rock to the white audience during the British Invasion. B: They experimented with the blues songs and created their own blues styles. C: They showed a rebellious attitude in their song which counts as part of that era. D: Their live performances always showed a high standard.