In the passage how many cancers are mentioned in relation to smoking cigars Aaily?
A. Six.
B. Seven.
C. Eight.
D. Nine.
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Routine X-ray chest examination is not so dangerous___________
In the last sentence of the second paragraph, "another" means__________
A. another routine
B. another shift
C. another week
D. another person
According to the passage, the main problem about night work is that__________
A. people hate the inconvenience of working on night shifts
B. your life is disturbed by changing from clay to night routines and back
C. not all industries work at the same hours
D. it is difficult to find a corps of good night workers
Sleep-walking is also one of the serious side effects induced by taking sleeping pills.
A. Right
B. Wrong
C. Not mentioned