根据句子意思，从方框中选用恰当的词或短语填空。

stronger, grew into, by, quarrel with, fewer, at the same time, looked up, never, realized

My school has          weeks off in the summertime than Daniel’s school.
Xi Wang          a healthy young giant panda and weighed 35 kilograms.
Daniel is very clever, but he          shows off.
This CD-ROM helps you learn English          testing your knowledge of English grammar and vocabulary.
To tell you the truth, sometimes I          my cousin Shirley.
You can’t sneeze and keep your eyes open         .
Later, the government          it was a very serious problem and took action to reduce the pollution.
The spirit of the Olympics is “Swifter, higher,         .”