12.It this book___you bought the other day.

12.It this book___you bought the other day.
A.that B.the one C.what D.which 为什么选B?
13.our earth is full of sound because it is full of motion,like___along the high way.
A.cars rolling B.car's running C.cars run D.car's to run 为什么选A?
14.i carried one of the ___.
A.box of books B.boxes of books C.boxes of book D.book's boxes 为什么选B
15.____the people of our village buy meat every day.
A.just a few B.only some C.not much of D.not many of 为什么选D
17.he wrote to his mother a month ago,but i'm sure he___since then.
A.hasn't written B.didn't write C.wasn't writing D.wasn't written 为什么选A
18.you were pleased when you heard the result,___?
A.didn't you B.weren't you C.wasn't you D.didn't it 为什么选B