Whatdoyouthinkofhismotionthatwe__________aplayattheEnglishevening?

Allofmyeffortsto__________peacefailed.

Hiswife,towhomhe__________forthirtyyears,waschildless.

__________ were naturally a musical family .

英译汉：Development of exchanges that aggregate the information harvested by bots in order to reduce transaction costs and eliminate concerns of fraud; and