The __17__ was invented by a group of students at Brown University in Rhode Island __18__ a friend complained of waking up tired and performing poorly on a test. __19__ sleep-deprived people ourselves, we started thinking of __20__ to do about it, says Eric Shashoua, a recent college graduate and now chief executive officer of Axon Sleep Research Laboratories, a company created by the students to develop their idea.

　　1. A) beside B) near C) for D) around

　　2. A) upon B) before C) towards D) till

　　3. A) ensure B) assure C) require D) request

　　4.A) through B) into C) about D) on

　　5.A) reveals B) reverses C) resumes D) repeats

　　6.A) effect B) affect C) reflect D) perfect

　　7.A) already B) ever C) never D) even

　　8.A) means B) marks C) says D) dictates

　　9.A) removes B) relieves C) records D) recalls

　　10.A) proceeded B) produced C) pronounced D) progressed

　　11.A) by B) of C) with D) over

　　12.A) familiar B) similar C) identical D) same

　　13.A) findings B) prospects C) proposals D) purposes

　　14.A) prompt B) program C) plug D) plan

　　15.A) where B) this C) which D) that

　　16.A) then B) also C) almost D) yet

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