Our two senior programmers________each other ever since they were at college.A、k

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问题 Our two senior programmers________each other ever since they were at college.

选项 A、know
B、knew
C、have known
D、are knowing

答案 C

解析本题考查动词的时态。当ever since引导时间状语从句时，主句一般使用现在完成时，从句用一般过去时。两个程序员从大学起就认识，一直持续到现在，故用现在完成时，因此确定本题答案为C。know是一般现在时，knew是一般过去时，are knowing是现在进行时，这三种时态都不符合语法要求，均可以排除。

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Our two senior programmers________each other ever since they were at college.A、k

Ourtwoseniorprogrammers________eachothereversincetheywereatcollege.A、k

Whataretheresponsibilitiesoftheseniorexecutivesinacompany?Theyestabl

Itishighlydesirablethatanewpresident______forthiscollege.A、isappoint

Aseriesofculturalprogrammers(hold)______inShanghaitocelebratethislarge

Wherewouldthisconversationmostlikelybeheard?[br][originaltext]M:Could

[img]2014m9x/ct_egreqj_egreqbj_0016_20148[/img][br]AInthisquestionyouareg

Americans’circleofcloseconfidantshasshrunkdramaticallyinthepasttw

Thesimpleactofsurrenderingatelephonenumbertoastoreclerkmaynots

WhywasscientificsatelliteMAVENsenttospace?[br][originaltext]Inthisse

[originaltext]W:Areyoureadytoordersoup?M:Yes.I’dliketohavesomeve

下列税种中，属于流转税的是()。A、个人所得税 B、车辆购置税 C、消费税

对某竣工的火灾自动报警系统进行验收时发现一个火灾探测器无法发出报警信号，则关于该

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患者来药店购买双歧杆菌三联活菌制剂,药师应该交待的使用注意事项包括()A.置于冰