the experts were now fully convinced that the animal ___a pu
the experts were now fully convinced that the animal ___a puma 1 must be 2 should have been 3 can only be 4 could only have been 请问选择哪一个,及分别说出每个为什么对与错 课文里面有一句话 The experts were fully convinced that the animal was a puma(这是课文原文)
是NCE 的课文吧...应该是第一个啊,意思是不确定是不是一定就是PUMA,第二个意思是应该做却没做的,第三个是只能是,第四个和第三个是一个意思 例句:where is she ? she must be at hospital, i saw her cut herself with the knive