Which of the following sentences is INCORRECT?
A. Three weeks was allowed for making the necessary preparations.
B. Tom, more than anyone else, is anxious to go there again.
C. Not only the teacher but also his students object to the change.
D. Both bread and butter was sold out in that grocery.
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Which of the following determiners(限定词)CANNOT be placed before both singular count nouns and plural count nouns?
A. some
B. the first
C. a many
D. such
流行病学的描述性研究包括普查、病例报告、对列研究、现况调查。()
Its said that Dr. Anderson was breaking fresh______in cancer research.
A. floor
B. land
C. earth
D. ground