In learning something you _not succeed but you _spare no effort.A.must;can B.should;may C.may;mustD.can;can

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Inlearningsomethingyou_notsucceedbutyou_sparenoeffort.A.must;canB.should;mayC.may;mustD.can;canInlea

In learning something you _not succeed but you _spare no effort.A.must;can B.should;may C.may;mustD.can;can
In learning something you _not succeed but you _spare no effort.A.must;can B.should;may C.may;must
D.can;can

In learning something you _not succeed but you _spare no effort.A.must;can B.should;may C.may;mustD.can;can
C
may表示可能,must表示必须
在学习一些事情上你可能不会成功但是你必须不遗余力