Discarding plate fragments is necessary for people's health.
A. Right
B. Wrong
C. Not mentioned
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"Which of the following best expresses Jeremy Rifkin's attitude toward designing
A. Strongly supportive.
B. Cautiously welcome.
C. Uncommitted.
D. Critical.
There would.be many more organ donors if__________
A. laws are designed to encourage organ recycling.
B. people cannot legally prevent a family member from donating his organ.
C. doctors are more willing to ask for donations.
D. transplant surgery is more successful.
A．overB．aboutC．onD．out
A. over
B. about
C. on
D. out
At first he didn't realize that he had succeeded.
A. know
B. find out
C. recognize
D. took into
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