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【单选题】
There is an obvious connection between getting overtired and getting sick.
A.
hard to understand
B.
easy to see
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】We need a strong adhesive to hang the poster on the wall. Otherwise, the poster will just fall off.
A.
glue
B.
surface
【单选题】Not long ago, there was no wireless communication. But now, living without it is inconceivable for many people.
A.
hard to find
B.
hard to imagine
【单选题】Many people like to use websites to interact with people with similar interests.
A.
find people’s contact information
B.
communicate with other people
【单选题】Attendance at our monthly meetings is mandatory. Everyone must attend.
A.
exciting
B.
required
【单选题】According to my auto mechanic, synthetic oil is better for my car than regular oil. He says man-made oil lasts longer.
A.
not natural
B.
not expensive