Beijing was under an “orange smog alert on Feb. 24, which marks the first time the second-highest warning level of a new system introduced last year .A. has been raised B. raisedC. has risen D. rose& 题目和参考答案——青夏教育精英家教网—

题目内容

Beijing was under an “orange” smog alert on Feb. 24, which marks the first time the second-highest warning level of a new system introduced last year________.

A. has been raised B. raised

C. has risen D. rose

【解析】考查时态和语态。该句句意：“北京在2月24号处于‘橙色’雾霾预警之中，这表明由去年所引入的新系统中的二级警报等级已经提高了。”这个警报系统是根据雾霾的水平来提高的，就像天气预报那样，如果有强台风来袭，气象部门就会提高警报级别，警报级别不会自动升高，故用及物动词raise的被动语态，又根据marks所体现的一般现在时，且句中“ introduced last year”为后置定语修饰system，可知“现在已经被提高了”，用现在完成时的被动语态，故正确答案为A.

考点：时态和语态

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A. Friendly assistance.

B. Unique scent.

C. Soft background music .

D. Attractive window display.

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B. urge shop assistants to change their attitude

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B. Ask every shop assistant to wear light perfume.

C. Place fragrant flowers in the shop.

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Title: Summer Vacation

Theme	A long summer vacation isn’t 1. in today’s world.
Basic Information	2. length	13 weeks in most American schools
Students’ 3.	·Sending messages and watching TV ·Playing video games ·Doing shopping
Disadvantages	·4. student’s academic skills and putting academic futures at risk. ·Being a 5. to families for they have to watch kids. ·Hurting students’ academic achievement and resulting in 76 significant ground.
Suggestion	A longer school year does not have to 6. to hard boring work. Richer and more imaginative lessons should be 7. , such as athletics, languages, music and the arts.
8.	Though being a ground thing, summer vacation might be out of 9. in the 21st century.

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