[单项选择]It is a kind of illness that can result in total blindness if ____
A. to leave untreated
B. is left untreated
C. leaving untreated
D. left untreated

[单项选择]This is an illness that can result in total blindness _________ left untreated.


A. after
B. if
C. since
D. unless

[单项选择]What kind of psychological background can probably best account for crimes Ramos has committed


A. He is being insane.
B. He has had some family murdering records.
C. He has been associated with some important figures in the country

[单项选择]What kind of machine can generate negative ions indoors


A. Ionisers.
B. Air-conditioners.
C. Exhaust-fans.
D. Vacuum pumps.

[单项选择]Henry James' kind of realism can best be described as ______.


A. psychological realism
B. critical realism
C. naturalism
D. surrealism

[单项选择]What kind of goods can not be sold in auctions


A. Those produced in the same factories.
B. Those provided by the same sellers.
C. Those which have the same qualities.
D. Those which have only one bidder.

[单项选择]Can Digital Textbooks Truly Replace the Print Kind The shortcomings of traditional print edition textbooks are obvious: For starters they’re heavy, with the average physics textbook weighing 3.6 pounds. They’re also expensive, especially when you factor in the average college student’s limited budget, typically costing hundreds of dollars every semester. But the worst part is that print versions of textbooks are constantly undergoing revisions. Many professors require that their students use only the latest versions in the classroom, essentially rendering older texts unusable. For students, it means they’re basically stuck with a four pound paperweight that they can’t sell back. Which is why digital textbooks, if they live up to their promise, could help ease many of these shortcomings. But till now, they’ve been something like a mirage(幻影) in the distance, more like a hazy(模糊的) dream than an actual reality. Imagine the promise: Carrying all your textbooks in a 1.3 pound iPad It s
A. they are not reused once a new edition comes out
B. they cost hundreds of dollars every semester
C. they are too heavy to carry around
D. they take a longer time to revise

[单项选择]What kind of metals and minerals can we find in the Antarctic


A. Magnesite, coal and oil.
B. Copper, coal and uranium.
C. Silver, natural gas and uranium.
D. Aluminum, copper and natural gas.

[单项选择]What kind of the spirit we can get from those martyrs


A. Devotion to the cause.
B. Honored death.
C. The birth of freedom.
D. The last full measure of devotion.