they have no problems ___ out the math problem.A.work B.working C.to work

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they have no problems ___ out the math problem.A.work B.working C.to work

they have no problems ___ out the math problem.A.work B.working C.to work
they have no problems ___ out the math problem.
A.work B.working C.to work

they have no problems ___ out the math problem.A.work B.working C.to work
答案选择B项.
have problems (in) doing sth 表示“做……有困难”;
work out是“做出”的意思‘
整句话是说“他们在做出这道数学题方面没有困难”.
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选B
在这里是相当于there be no problems (in)doing sth。属于固定搭配。