Look, Tom _______ as a clown[ ]
A. is dressing up
B. put on
C. worn
D. picked up
答案:A
The world famous director, three of ____ movies won Oscar awards, is reported to have retired.
A.whose
B.which
C.whom
D.his
TCP/IP协议簇中,网际组管理协议是()
A.IP
B.UDP
C.ICMP
D.IGMP