Necessaryaction
问题详情：Necessaryaction_______sothatstudentscanbesafeatschools．A．canbetaken B．mustbetakenC．maybetaken ...
Necessaryaction betakentoprotecttheenvironmentsotha...
问题详情：Necessaryaction betakentoprotecttheenvironmentsothatwecanhaveabetterworld．A．can B．must C．may D．might【回答】B．can能，会；must一定，必须；may可以；might，may的过去时，表示的可能*比may小．根据toprotectt...