George, like all boys,（）cars very much.
A. like
B. liking
C. are liking
D. likes
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It is of no use（） with him.
A. to argue
B. argue
C. arguing
D. to have argued
Which of the following adverbs can NOT be used to complete "Please come （） I have something to tell you. "
A. over
B. here
C. close
D. closely
No matter how frequently（）, the works of Beethoven always attract large audiences.
A. performing
B. to be performed
C. performed
D. being performed
在IP数据报报头中有两个有关长度的字段，一个为报头长度字段，一个为总长度字段。其中，______。
A. 报头长度字段和总长度字段都以8 bit为计数单位
B. 报头长度字段以8 bit为计数单位，总长度字段以32 bit为计数单位
C. 报头长度字段以32 bit为计数单位，总长度字段以8 bit为计数单位
D. 报头长度字段和总长度字段都以32 bit为计数单位
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