It must have rained last night ,__it is wet on the ground.
A. because
B. as
C. for
D. since
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He talks as if he______really_______it by himself.
A. has...done
B. had...done
C. did...不填
D. 不填... did
He is ________ I.
A. so tall as
B. so tall than
C. notso tall as
D. tall as
His father is _____the child.
A. three times tall than
B. three times tall as
C. as three times tall as
D. three times as tall as
PPP支持下列哪2种网络层协议?AB
A.IP
B.IPX
C.RIP
D.FTP
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