By saying “he gave us Christmas”, the author meant that the American sailor __________.
A. paid for the meals of the customers in the restaurant
B. inspired the others to be happy despite their anger and disappointment
C. respected the poor old flower woman as an equal human being
D. reminded the author to treat his wife in a polite way
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【单选题】下列不属于干扰素作用的是?( )
A. 引致细胞的凋亡与坏死
B. 具有广谱抗病毒作用,几乎能抗所有病毒
C. 能增强自然杀伤细胞的活力,加快杀伤被病毒感染的靶细胞
D. 具有明显的抑制肿瘤的作用
E. 具有高度的种属特异性
A football fan is _____ has a strong interest in football.
A. a thing that
B. something that
C. a person who
D. what
The house, _____ was destroyed in the terrible fire, has been repaired.
A. the roof of which
B. which roof
C.its roof
D. the roof
The matter _____ you were arguing about last night has been settled.
A.that
B. what
C. why
D.for which
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