语。

　　4．various　空白处所填词在句中修饰名词experiences，故需用vary的形容词形式。

　　5．though/however　本句与上一句存在转折关系，故此处填表示转折意义的副词though或however。

　　6．are　根据上下文语境可知，此处用一般现在时；be动词后面接的是可数名词复数形式，故填are。

　　7．choices　many修饰可数名词复数，故填choice的复数形式。

　　8．simply　空白处所填词在句中修饰谓语动词，故用simple的副词形式。

　　9．a　本句句意：宇航员感到无聊是个大问题吗？

　　10．suffering　本句中"astronauts suffering from serious health problems"是动名词复合结构作lead to的宾语。

　　Ⅱ.短文改错

　　As Teachers' Day was approaching, our class decided to celebrate an important day for a change this year. In the afternoon of September 10, some of them decorated our classroom with paper flowers and balloons. Some decorated the blackboard, which was read "Happy Teachers' Day！". And another went to buy cakes, drinks and fruits. Enter the classroom, Mr Li was surprised to find we were standing in line, clapping hands and saying "Happy Teachers' Day！". Wang Hua, our monitor, presented him the prepared flowers. The girls sang songs for Mr Li, and the boys put on an interested performance. After we left, we enjoyed a new English song by Mr Li. How a wonderful time we spent with Mr Li.

　　答案：第一句：an→the

　　第二句：In→On; them→us

　　第三句：去掉was

　　第四句：another→others

　　第五句：Enter→Entering

　　第六句：him后加with

　　第七句：interested→interesting

　　第八句：After→Before

　　第九句：How→What

　　Ⅲ.书面表达

假设你叫李华，和父母乘英国某航空公司的航班ZF2730从上海到英国伦敦去看球赛