研究药物对机体作用及其原理和规律的科学叫________。研究机体对药物作用规律的科学叫___________。
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Thanksgiving is celebrated on _____ in the United States.
A. the first Thursday in November
B. the fourth Thursday in December
C. the first Friday in December
D. the fourth Thursday in November
People in Canada usually ______.
A. do not celebrate Thanksgiving
B. celebrate Thanksgiving on the same day as the Americans
C. celebrate Thanksgiving earlier than the Americans
D. celebrate Thanksgiving later than the Americans
People in the United Sates celebrate Thanksgiving _____.
A. at home
B. at large restaurants
C. in parks
D. publicly
For Thanksgiving, people in the US can usually stay awayfrom work for _____ days.
A. 1
B. 2
C. 3
D. 4
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