He tired his best to work out the problem and ( ) he finished it with the teacher's help A at the end B in the end C by the end D to the end

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• He tired his best to work out the problem and ( ) he finished it with the teacher's help A at the end B in the end C by
• A.Eventually B.Finally C.At last D.At the end63.The matter has nothing to do with him; he was just ____________ his duty.A.applying B.using C.performing D.playing64.You've got this entire nice plan about your future business.But _________ it doesn't work out?A.what about B.how about C.what if D.what happens65.This new method was particularly _________ in our situation as we do not have enough money for the experiment.A.related B.relevant C.connected D
• 15.He won’t give up until he the problem.A.work on B.at work C.will work out D.works out15.He won’t give up until he the problem.A.work on B.at work C.will work out D.works out16.It’s a good habit breakfast every day.A.had B.have C.has D.to have17.The students are to get good results.A.hard work B.hard working C.work hard D.working hard18.each term,teachers give out new books.A.In the end B.In the beginning of C.at the begining D.at the beginning of
• He tired his best to work out the problem and ( ) he finished it with the teacher's help A at the end B in the end C by the end D to the end
• He tried his best to work out the problem and ________he finish it with the teather's help.A.at the end B.in the end C.by the end
• This math problem is too difficult _____.A.for me to work it out B for me to work outC of me to work it out D of me to work out 选哪个说的详细点 为什么不选A?
• although he tired his best,he failed to work out the problem. Alth……he ___ ___ to ……