31（ ）

• A、convenient

• B、common

• C、private

• D、difficult

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

61．新學(xué)期伊始，你（Li Yuan）有意加入學(xué)校環(huán)保社團(tuán)（Environmental Club）。請(qǐng)給該社團(tuán)寫一封申請(qǐng)信，內(nèi)容包括：

·個(gè)人情況介紹；

·申請(qǐng)加入的原因；

·你期望在社團(tuán)中承擔(dān)的工作；

·你對(duì)社團(tuán)發(fā)展的建議。

Which of the following is true about sleep according to Paragraph 1?

• A、Sleep helps people study effectively.

• B、Newborns' sleep patterns vary greatly.

• C、Adults and teenagers need similar sleep tim

• D、Sleep is important for body functionin