---Have you seen my e-mail about our TESL, project?
---Yes. Luckily, I checked my e-mails yesterday. Normally, I my e-mail-box for days.
A．haven’t opened B．didn’t open C．hadn’t opened D．don’t open
QQ, you can chat with your friends, makes communication easy.
A．as B．which C．that D．where
He is really like a gentleman and he usually the door open to let the ladies go first.
A．holds B．leaves C．keeps D．makes
Which exports an important role in its economic growth now, this province has been affected by the global economic downturn.
A．played B．to play C．playing D．play
As we know, Potala Palace（布达拉宫）,a combination of Tyibetan constriction art and culture, is considered precious treasure of China.
A．不填；a B．the; a C．the; the D．the;不填
全球气候变暖是目前人类面临的最大环境问题。请你根据以下提示，写一篇英语短文,为“节能减排”献计献策。
背景：随着经济的发展,更多的温室气体被排放,其中大约70％为二氧化碳,这也是全球变暖的主要原因之一。
后果：海平面上升；自然灾害频繁。
措施：1. 多使用清洁能源,少用煤、油；
2. 在可能的情况下以步代车；
3.……
4.……
词汇提示：温气体greenhouse gases 二氧化碳CO2 全球变暖global warming
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