Writing: For this part, you are supposed to write an e-mail in about 100 - 120 words based on the following situation. Remember to write it clearly.

你(Li Yuan)下周一因為要去參加演講比賽，不能上外教(Prof.Smith)的寫作課。請給他寫一封e-mail，內容包括:

·請假并表示歉意；

·解釋不能上課的原因，如比賽的重要性；

·承諾會自學所缺內容并按時交作業；

·祝他偷快。

Why is compared to a fertilizer in Para. 3?

• A、They both absorb light.

• B、They both store heat.

• C、They both help plants grow.

• D、They both cause global warming

23.

• A、harm

• B、advantage

• C、test

• D、risk