单项选择题
The train（）at 7∶00，but we have been waiting for as long as two hours．
A.must have arrivedB.might have arrivedC.was supposed to arriveD.arrived
单项选择题 All the attempts to rescue the child from the burning building were（）．He died soon afterwards．
单项选择题 This is（）second time that I have failed，but I will never give up，I will try（）third time．
单项选择题 There is（）book over there and（）cover of（）book is red．
