Smoke alarms are used to quickly ____ fire or smoke in a building and give a early warning.

1. Smoke alarms are used to quickly ____ fire or smoke in a building and give a early warning.

A. reflect B. disturb C. detect D. represent

【考点】

动词的词义辨析;

【答案】

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单选题普通

1. As we joined the big crowd, I got from my friend.

A. separated B. spared C. lost D. missed

单选题容易

2. At home, he keeps some pets, to which he ______ all his spare time.

A. spends B. offers C. devotes D. provides

单选题容易