It __________ last night for all the trees are covered with snow now.A.must have snowed B.should have snowedC.may have snowed D.ought to have snowed
问题描述：
It __________ last night for all the trees are covered with snow now.
A.must have snowed B.should have snowed
C.may have snowed D.ought to have snowed
答
A 这里must 表猜测
答
答案应该是A .
答
It __________ last night for all the trees are covered with snow now.A.must have snowed B.should have snowedC.may have snowed D.ought to have snowed选项是Amust have snowed表推测【昨晚一定下了雪】,根据...
答
A
必然的很冷