甲乙两辆货车运送沙子，甲满载后每次可运 5 吨。现在甲满载先运了 2 车，然后乙加入，两车都是满载，一共又各运了 7 次完成任务，此时，乙车比甲车多运了 4 吨沙子，那么，若乙单独运输前面每次都满载，则最后一次运送的沙子是（）吨。<br/>

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The income divide remains ( ) although African Americans have increased the leve

A more widely B wide C widely D wider

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India has downplayed the impact of US, plans to end New Delhi's preferential tra

A worthing B worth C worth of D worthy of

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Four Big Tech CEOs spent Wednesday being grilled—virtually—by House lawmakers, c

A view B lesson C spectacle D exhibition

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Even as millions of Americans have lost their jobs in the past few weeks, nonpro

A giving up B giving back C giving away D giving out

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Caregiver stress is a well-known phenomenon and good one to avoid. It can lead t

A danger B adventure C emptiness D burnout

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The U.S. is slowly ( ) the sharpest economic contraction in modern history, as p

A forcing upon B squeezing into C dragging out D looking out for

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The federal government has issued guidelines to give a 50% ( ) in a fixed time-f

A benefit B bonus C allowance D subsidy

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Students with attention ( ) or communication difficulties may not be able to foc

A disparity B difference C debt D deficit

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Researchers at Pennsylvania State University are intent on creating a robotic sy

A artificially B completely C manually D synthetically

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The decline in Germany's output last quarter, if calculated on an annual basis w

A count in B amount to C go up D aim at

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A 3

B 4

C 6

D 7