3.Virus can kill cancer cells and stop them from growing again.
4.Cancers Achilles heel refers to the fact that virus may stay safely in a tumor and replicate.
5.To infect the cancer cells, a good deal of viruses should be injected into the tumor.
6.Researches on animals indicate that virus could be used as a new way to treat drug-resistant tumors.
Question 7-9
Based on the reading passage, choose the appropriate letter from A-D for each answer.
7.Information about researches on viruses killing tumor cells can be found
on TV
in magazines
on internet
in newspapers
8.To treat tumors spreading out in body, researchers try to
change the body immune system
inject chemotherapy drugs into bloodstream.
increase the amount of injection
disguise the viruses on the way to tumors.
9.When the chemical modified virus in tumor replicates, the copies
will soon escape from the tumor and spread out.
will be wiped out by the bodys immune system.
will be immediately recognized by the researchers.
will eventually stop the tumor from spreading out.
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