she had no difficulty _ the problem.A.worked out B.working out C.to work out D.to have worked out

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• she had no difficulty _ the problem.A.worked out B.working out C.to work out D.to have worked out
• 1.We have a lot of trouble ______to the top of the hill before eight o'clock.A.get B.to get C.got D.getting2.We had ____ difficulty _________ through the snow.A.much,drive B.many,to drive C.much,driving D.much,with drive3.I have trouble _____ the math problem without your help.A.to work out B.working out
• ( )I will be back in a minute.You have to wait here for _.A.some time B.sometime C.sometimes D.some times( )I felt sorry that you _ stay in hospital for three months.A.had to B.could C.may D.need( )They are busy _ an unusual plan for you.A.to work B.working out C.with work out D.working ( )I could see the students _ trees when I walked past the park yesterday.A.are planting B.planted C.to plant D.planting( )My mother stops my little brother _ a lot of
• It took Tom three days ____the project A.to work out B.working out C.to have worked out
• It took Tom three days ____the project A.to work out B.working out C.to have worked outD.to be worikng 正确答案是A 为什么不选C
• she had no difficulty _ the problem.A.worked out B.working out C.to work out D.to have worked outshe had no difficulty ___ the problem.A.worked out B.working out C.to work out D.to have worked out 为什么选B
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• 哪个对have she been working fou 1hour?/has she been working fou 1hour