A.N、N、S、N
B.S、N、S、S
C.S、S、N、N
D.N、S、N、N
答案:D
— I am so happy that John now enjoys big parties.
— Really? He used to in front of strangers.[ ]
A. to host; be shy
B. hosting; being shy
C. hosting; be shy
D. to host; being shy
电气工具和用具保管及使用有何规定