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题型：单选题题类：常考题难易度：普通

人教版（新课程标准）高中英语必修五Unit 5 First aid基础练习

If _________to look after luggage for someone else, you should inform the police at once.

A、asked B、to ask C、asking D、having asked

举一反三

The top students ______ at the assembly today were awarded a pen and a notebook each.

It's standard practice for a company like this one______ a security officer.

Having {#blank#}1{#/blank#} (bargain) with the salesman for an hour, she decided to buy the ring.

The newly built earthquake-resistant houses in Xinjiang have resisted more than 30 earthquakes _______ 5.0 magnitude or above in the past seven years.

{#blank#}1{#/blank#} (direct) by the teacher, all the students have learned how to refer to the dictionary.

Global warming is widely considered {#blank#}1{#/blank#} (increase) the frequency and severity of natural disaster, making the environment even worse.

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