287. The clear colorless liquid that falls as rain, fills lake and rivers, and is necessary for life to exist is______.
what is needed and what is possible, we set a growth target of around 7.5 percent economic growth.
Scientists say human activity contributes to climate change, but they do not agree on the rate_______ climate change may be developing.
______ I always felt I would pass the exam, I never thought I would get an A. A. While B. Unless C. If D. Until
The English teacherher students how to improve their comprehension skill since last week.
Mary ______ all the housework, she dropped herself into the sofa, sighing with relief.