--It is really fun to hike and I often go hiking in the forest.
--But hiking alone in the forest ______ be very dangerous.
A.can | B.must | C.shall | D.will |
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--It is really fun to hike and I often go hiking in the forest.
--But hiking alone in the forest ______ be very dangerous.
A.can | B.must | C.shall | D.will |