It_______fortwohoursnow
A、rainsD
雨现在还在下，是持续到现在的动作，所以根据句意，用现在完成进行时比较好。
______isrecognizedasthenationalflag-carrier.
Awell-knownexampleofthelargescaledestructionofanecosystemthroughvegetationremovaltoaccommodatetouristfacilitiesisthecaseofthe_______.
WhichofthefollowingisnotmentionedasWTO'sobjective?
Hefound_______difficulttostudymaths.
Chinaisamountainouscountry.Hills,mountains,andplateauscover_______ofthetotalarea.
