Beijing's first unmanned subway trains, which can run ______ without the control of any drivers, are expected to be put into operation next year.
The Bull team _______ the football match and they ______ much experience in playing football.
Do you know the farmer under the big tree?
The ____ boy was last seen ______ by the lake. A missing, playing B.missing, play C. missed, played D.missed , to play
—There is likely to be heavy rain tomorrow. —_______, we’ll have to change the plan for the outgoing.
People have realized that they should go on _____ balanced diet and do _____ exercise every day.