题目内容

【题目】His command was that we __________ immediately.

A. started off

B. had started off

C. start off

D. would start off

【答案】C

【解析】句意:他的命令是我们立即出发。that引导表语从句,句子主语为command,表语从句用虚拟语气,虚拟语气的构成为:(should)+动词原形,should可以省略。

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But mobile connections have their defects: they don’t carry as much information as broadband does, making opening websites and downloading music slower than they are on a Wi-Fi connection. This is why mobile connections have been constantly upgraded since the first generation was launched back in the 1980s.

According to BBC, 4G is five to seven times faster than current 3G network speeds, almost as fast as home broadband. Because of this, 4G is widely suited for services like video downloading, mapping, online shopping and even video conferencing.

To achieve the high speeds, network companies have to spend a lot of money on building new signal towers, which will eventually lead to a higher phone bill if you switch to 4G,, and you will also have to get a new phone with 4G capacity.

【1】What is paragraph 1 mainly about?

A. The development of Wi-Fi.

B. Various ways to get access to the Internet.

C. The influences of the Internet on our life.

D. The convenience of using cellphones.

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A. disadvantages B. functions

C. qualities D. benefits

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B. It can’t satisfy the users’ basic needs.

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A. Its service is worth the price.

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A. They could earn much, but they had to work hard.

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