假设你是李华，请根据下表提示给你的笔友Jack写信，向他介绍你的两位朋友刘伟和张达休假计划，并顺便征询Jack对你的休假有何建议。
| 刘伟 |
张达 |
李华 |
| 上网、听音乐、看电视 |
读书 |
|
| 游泳、打网球 |
社会公益活动 |
还没有决定； 请对方提建议 |
| 做家务 |
旅游、参观梦想大学 |
注意：1．词数：ll0左右。
2．文章的开头和结尾已为你写好，不计入总词数。
Dear Jack，
I am writing to tell you about my friends’ plans for the holidays .
Until the start of the Industrial Revolution, mankind was poor, hungry, and constantly at the _______ of disease and natural disasters．
| A．power | B．limit | C．control | D．mercy |
Student loan is supposed to provide financial support for people who would _______ not be able to go to college．
| A．therefore | B．meanwhile | C．otherwise | D．nevertheless |
A new survey released by Yale University finds that Americans trust scientists most when ______ comes to information on climate change．
| A．that | B．it | C．this | D．there |
The massive earthquake and tsunamis has killed 350 people in a coastal town in Chile so far, _______ the total death number reported last Sunday．
| A．doubled | B．to double | C．doubling | D．having doubled |
In the USA, _______ Thanksgiving Day is a harvest festival．Traditionally, it is _______ time to give thanks for the harvest and express gratitude in general．
| A．the; a | B．/; the | C．/; a | D．the; the |