Question

【题目】He go out because the stove was on fire.
A.may not
B.can't
C.couldn't
D.might not

Answer 1

【答案】C
【解析】句意：因为炉子着火了。was是过去时，情态动词中的must, can, could, may, might都表推测。其中must的可能性最大，can / could次之，may / might最小。could是can的过去式，故选C。