—Much personal information is stolen when people buy things on the Internet.
—Terrible! _____ must be done to keep the Internet safety.
句意为“许多用户的信息在他们网上购物时被窃取了。”“真糟糕！____必须做 来保证网络安全。”Everything每件事；Anything任何事；Something一些事；Nothing没有事。根据语境及常理可知应该做一些事来保证网络安全。故选C。
—Much personal information is stolen when people buy things on the Internet.
—Terrible! _____ must be done to keep the Internet safety.
—Where would you like to go this Mid-Autumn Festival?
—I’d like to go ____.
—It’s sunny outside. Why not go out and have a look?
—There ____ is here. I just want to have a rest.
There is ___ juice in the fridge. I must go to the supermarket at once to buy some.
____ of my time is spent on learning. So I have made much progress in my study.
Most students are playing on the playground and there are still ____ students staying in the classroom．
My twin brothers promised my parents to give up playing computer games, but ____ of them made it.
—I don’t know how to do. Any good suggestions?
—Don’t always think of yourself, and you should also think of ____.
—Would you like to play basketball or football?
— ____ is OK. I am good at both of them, so it’s up to you.
—How did you get the MP4, from a shop or by phone?
— ____. I always like shopping online.
