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The World Wide Web is sometimes jokingly called the World Wide Wait because it ________ be very slow.   
A.shouldB.mustC.willD.can
D
考查情况动词。can可以表示一种客观存在的可能性,但不一定就会发生。A应该;B必定,必须;C将;句意:….因为它有可能会很慢。
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