________ matters most in learning English is enough practice.
A. WhatB. WhyC. WhereD. Which
You ________ be tired—you’ve only been working for an hour.
A. must not B. won’tC. can’tD. may not
More than a dozen students in that school ________ abroad to study medicine last year.
A. sentB. were sentC. had sentD. had been sent
________ how to do the homework, I went to ask my teacher for help.
A. Not knownB. Not knowing
C. Not knowD. Not being known
The children loved their day trip, and of all the activities they enjoyed the horse ride ________.
A. mostB. moreC. lessD. little
随着全球环境的恶化，为保护环境，越来越多的人选择过“低碳生活（low-carbon life）”即减少二氧化碳的排放，低能量，低消耗，低开支的生活。请写一篇英文倡议书，倡议你的同学加入“低碳生活”，为环保做出贡献。请参照以下要点：
• 1. 用手洗衣服
• 2. 多走楼梯，少用电梯
• 3. 去超市自备购物袋
• 4. 步行或骑自行车上学
注意：1．词数100左右；
2．可以适当增加细节，以使行文连贯；
3．开头已给出，不计入总词数；
4．参考词汇：楼梯：stairs 购物袋：shopping bags
With the global warming getting worse, more people choose to live a low-carbon life for the purpose of reducing green-house gases. ___________________________________
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