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i read it somewher in the idiom list. when "attemt" is used as a "noun", the preposition it takes is "at" and when "attemt" is used as a "verb", the preposition it takes is "to"
taking that into account this sentence should have "at" as "attempt" is used as a "noun".
but OA is A.
please clarify this.
IMO E) is out because the use of present perfect "has begun" indicates that the attempt started in the past until now, but that is wrong, because in the 2nd part of the sentence it is stated that the attempt was unsuccessful and so we can infer that the attempt is completed. so it should be simple past and not present perferct. i also think that "attempt to" as well as "attempt at" can be used when "attempt" is a noun. finally i think we dont need a restcrictive clause, because the information about the period of time is not essential for the meaning of the sentence.
If your mind can conceive it and your heart can believe it, have faith that you can achieve it.