—Cathy, did you attend the lecture given by Mr Black last night? —No. I ______ a report at the office.
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.
—How many practical plans has your deskmate made this week? —. All have turned out disappointing.