题目内容
The nurse won't leave her patients________she's sure they are all taken good care of.
A. unless B. because C. since D. if
七星图书口算速算天天练系列答案如今，很多城市出现了一种绿色出行方式――共享单车（bike-sharing），它因环保、便捷而备受青睐，但同时也引发了一些问题。请你根据提示以＂Bike-sharing＂为题写一篇英语短文，表达自己的看法和建议。
要点提示：
Advantages | Be convenient, less pollution, reduce the traffic pressure（减缓交通压力） Take exercise… |
Problems | Throw away, damage（毁损）, be stolen… |
Advice | Civilized（文明的）, follow the rules, take good care of… |
注意：
1. 短文应包括以上要点，可适当发挥，以使行文连贯；
2. 文中不得出现真实的人名、校名及地名；
3. 词数：80-100（文章开头已给出，不计入总词数）。
Bike-sharing
Today, as a greener means of transportation, bike-sharing is becoming more and more popular in many cities. ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________