单项选择题
This is（）second time that I have failed，but I will never give up，I will try（）third time．
A.the；theB.a；theC.a；aD.the；a
单项选择题 There is（）book over there and（）cover of（）book is red．
单项选择题 Riding bikes has advantages（）driving cars（）many aspects.
单项选择题 （）Smiths are on holiday now, but（）White often comes to look for them．
