[题目]I hear that my brother won the singing competition last Friday , but I’m not sure that.A. over B. on C. about D. in 题目和参考答案——青夏教育精英家教网—

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【题目】I hear that my brother won the singing competition last Friday , but I’m not sure _______ that.

A. over B. on C. about D. in

【答案】C

【解析】试题分析：句意：我听说上周五我哥哥赢得了歌唱比赛，但是对此我不确定。根据固定短语：be sure about,对…确信，确定。根据句意及结构，故选C。

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【题目】阅读理解B

Three months after Shang Hai (not his real name) began studying at an American high school, he received an e-mail of dismissal. The academic performance of the Chinese boy was poor–he had got grades C and D (A is the best) for most courses.
Shang is not alone. In the first half of 2014, the number of Chinese students studying in the US has increased to 275,000. But according to China Youth Daily, about 5 percent of Chinese students in US colleges are unable to graduate.
They are being sent back home because their grades are not good enough (62.1%), they cheat, such as copying other students' work (21.4%), and they have poor class attendance (10.9%).
These appear to be not from a lack of intelligence , but a lack of discipline , said the report. The situation has been getting worse since more Chinese students are studying in foreign countries at younger ages. According to the US Department of Homeland Security (DHS), the number of Chinese students studying in US private high schools has increased from 65 in 2005 to 23,795 in 2013.
Far away from their parents, some students are said to spend a lot of time chatting with friends, going to parties, and playing online games.
There are also great language problems. Although they have to pass language tests to study abroad, daily communication is still hard for many Chinese overseas students, according to research at Indiana University in 2013.
Because of this, many of them just stick with other Chinese students. They don't often take part in sporting events or study groups. And some could only catch bits of information during classes, said the research.
（1）Some Chinese overseas students spend lots of time ________.
A.playing online games
B.doing sports
C.chatting with parents
D.visiting American friends
（2）Many Chinese overseas students stick with Chinese students because ________.
A.they are too young
B.they have language problems
C.they don't like American lifestyle
D.they miss their family in China
（3）What can we learn from the passage?
A.More Chinese students study in foreign countries at older ages.
B.The number of Chinese students studying in American has fallen since 2013.
C.A lots of Chinese students take part in sporting events while they are studying abroad.
D.About 5% of Chinese students in American colleges may not be able to get the degree.
（4）Why were some Chinese overseas students sent back home?

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