听下面一段材料,回答第1至4题. |
1 .When are people easy to catch a cold? |
A.In spring or winter. B.In spring or autumn. C.In autumn or winter. |
2.Why haven't scientists found a cure for the common cold according to the passage? |
A.There are too many kinds of cold viruses for them to identity. B.It is not economical to find a cure for each type of cold. C.They believe people can recover without treatment. |
3.What does the speaker say about the symptoms of the common cold? |
A.They reveal the seriousness of the problem. B.They indicate how fast the virus spreads. C.They show our body is fighting the virus. |
4.What do some scientists say about taking medicines for the common cold? |
A.It helps us to recover much sooner. B.It actually does more harm than good. C.It causes damage to some organs of our body. |
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你能帮帮他们吗