Please ________ your ashes before it fails on the carpet.
A. cut off B. knock off
C. get off D. drop off
You can’t use the computer now, ________ the upgrade of the system is under way.
A. until B. unless
C. as D. after
The man ________ the fake news that 18 firefighters lost their lives in the explosion was arrested.
A. having circulating B. to circulate
C. circulating D. to have circulated
假定你是李华，你的美国笔友John来信请你介绍中国传统节日清明节。请根据下表要点，用英语给他写封回信。
节日 | 日期 | 活动 |
清明节 |
4月5日前后 |
放假三天，扫墓祭祖；踏青游玩，放风筝等 |
要求：1.词数100左右；
2.可以适当增加细节，以使行文连贯；
3.开头和结尾已经为你写好，但不计入总词数。
Dear John,
Glad to hear from you, I’d like to tell you something about the Qingming Festival.
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours,
Li Hua
短文改错
注意：1.每处错误及其修改均仅限一词；2．只允许修改10处，多者(从第11处起)不计分。
Our class joined in a meaningful activity during the winter vacation. First, we went to visit the old lady who lived all alone. Some chatted with her but others helped do a thorough cleaning for us. When the work was done, the house looked real neat and tidy. Then we went to the sport center, where all equipment needed polished. We set out to work at once. Everything was dust-free at no time. Having done all this, we saw a pleasant community than before. Tiring as we were, we felt happy as all of our work was paid off.
阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。
Two new satellites of BeiDou Navigation (导航) Satellite System (BDS)1.(send) into space on a Long March-3D carrier rocket from the Xichang Satellite Launch Center in Sichuan Province, China at 2:07 a.m. on November 19, 2018. The satellites entered a Medium Earth orbit (轨道) 2.(safe) more than three hours later and will work with 17 other BDS-3 satellites already in space. They are also the 42nd and 43rd3.(member) of the BDS satellite family.
China launched these satellites with the aim of providing navigation services4.countries and regions which participate in the Belt and Road Proposal by the end of 2018. “This is a key and5.(value) step for BDS developing from a Chinese experimental system to a regional and then a global navigation system,” said Yang Changfeng, chief expert6.contributed much to the BeiDou system. The positioning7.(accurate) of the BDS-3 system has been improved to 2.5 meters to 5 meters, said Yang.
8.(name) after the Chinese term for the Big Dipper, the BeiDou system has been serving China for 18 years where another six BDS-3 satellites will be put into the Medium Earth orbit from 2019 to 2020. The system is expected9.(provide) first-class services around10.globe by the end of 2020.
