have you found a way to solve the problem?

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have you found a way to solve the problem?
no ,I ______it carefully,but I havent come up with one yet.
A am cnsidering B considered C have been considering D had considered
为什么不选A C D

后半句是现在完成时,表示过去发生且持续到现在的动作（或与现在有关联的动作）,那么前半句时态也必须是表示过去的.用排除法,A是现在进行时,表现在,不对；C是现在完成进行时,强调现在持续进行,不对；D是过去完成时,表示过去的过去,若用此时态,句中必须有对应的表示过去之前的时间状语,但此句没有,因此不选.从句意出发,应选B,或者现在完成时也说得通,但是选项中没有,因此只能选B

have you found a way to solve the problem? the way you have thought of to solve the problem is much bet you have your own way to solve the problem.改为反义疑问句 Finally,they found a ____ to the problem.(solve) Have you found the best way to work out the problem同义句Have y （同义句转换）1.Did you think of a better way to solve the problem? Can you find out a way to solve the problem?（改同义句） Keep t__ and you will find a good way to solve the problem. 英语根据字母填空 1.Could you s__ us a good way to solve the problem? 6.To solve the problem,you have many ways to ______.A.choose the way you thought of to solve the problem 中的to可以去掉吗? we have got to ( )a new way to solve this problem