Scientistsdoubtwhetherit’s________toregulateone’sbiologicalclockbydrinking.
A、feasibleA
A 可行的、可能且合理的 B 不可相信的、难以置信的 C 时髦的、时尚的 D 贵重的、宝贵的
Themissingboyswerelastseen________neartheriver.
______alittleearlier,Iwouldhavecaughtthetrain.
______aretheprimarydestinationsfortheChineseatpresent.
Hefound_______difficulttostudymaths.
Awell-knownexampleofthelargescaledestructionofanecosystemthroughvegetationremovaltoaccommodatetouristfacilitiesisthecaseofthe_______.
