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【单选题】
健康的运动者要想达到相应的运动效果运动时间至少在多少分钟以上:A.
半小时
B.
15分钟
C.
20分钟
D.
一个小时
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反馈参考答案：
举一反三
【单选题】John was seen ____ in by the back door, but nobody saw him ___.
A.
to come…to leave
B.
come… leave
C.
to come… leave
D.
come…leaving
【单选题】Nobody saw her in the office today. She ________ the lecture.
A.
mustn’t have attended
B.
couldn’t attend
C.
couldn’t have attended
D.
hasn’t had attended
【单选题】选择与画线部分意思相同或相近的选项。 I called Jim just now, but nobody answered. [ ]
A.
saw
B.
visited
C.
told
D.
phoned
【简答题】If you say that something is m______, you mean that it is clearly true and that nobody would disagree with it if they saw it or considered it
【简答题】因特网上提供的主要信息服务有电子邮件、文件传输、 ______ 和 __________ 四种。
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