Children have more colds because___________
A. they are usually infected about eight times each year
B. they are not immune to many cold viruses
C. they never wash their hands so that their thumbnails are dirty
D. they don't like eating lemon
查看答案
The best way to keep yourself from getting colds is___________
A. to keep yourself clean
B. to use a disinfectant soap
C. to take two aspirin pills every day
D. to drink lots of water
A. onlyB. soleC. IonelyD. alone
A. only
B. sole
C. Ionely
D. alone
Stephanie Denton is an expert___________
Written materials constitute the best form. of continuing medical education.
A. Right
B. Wrong
C. Not mentioned
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