Hefound_______difficulttostudymaths.
A、itA
暂无解析
______ the new plan can be carried out will be discussed at the meeting tomorrow.
______alittleearlier,Iwouldhavecaughtthetrain.
InEurope_______arethetwoleadingcontendersforaglobalreservationssystem.
________hehasmanyfriends,heisoftenfeelinglonely.
Awell-knownexampleofthelargescaledestructionofanecosystemthroughvegetationremovaltoaccommodatetouristfacilitiesisthecaseofthe_______.
