题目内容：

阅读短文内容，从短文后的选项中选出能填入空白处的最佳选项。

Look at the tower! Nothing is wrong with your eyes. 1. As the name says, the Leaning （倾斜的）Tower of Pisa leans. It is in Pisa, a city in Italy.

2. In 1173, people in Pisa began to build the tower. In 1178, when the tower was just three storeys（层）tall, it began to lean. There were wars in Pisa at the time. So the construction（建造）of the tower stopped for years. After about 200 years, in 1370, people finished the construction.3. It is 55.86 meters tall.

4. There are many opinions. One goes like this: The tower is very tall and heavy, but the ground is made of soft sand and clay. When the ground sinks, the tower leans.

Did you know these? The tower was first the bell tower to a large church.5.Each bell stands for a musical note（音符）. From 1990 to 2001, the tower was closed to visitors. Workers repaired it. The tower may stand for another 200 years.

A.The tower has eight storeys.

B.There are seven bells in it.

C.There is something wrong with the tower.

D.Why does it lean?

E.Let’s know about its history