单项选择题

The boy climbed up to the top of the mountain,（）he could see nothing but clouds.

A.in which
B.which
C.when
D.from where

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单项选择题

“Have you told her about it ？ Sorry，I forget （）about it.

A.telling her
B.being told
C.to tell her
D.having told her

单项选择题

How dose it explain the causes of the increasing juvenile crimes.It says that（）

A.part of the reason is the influence of Internet violence
B.a healthy internet-surfing evvironment is needed
C.the operatinf companies don’t filter the sontent online