It _____ last week that the haze(雾霾)in Beijing caused many problems.
How can _____ man like him be recommended as _____ head of our hospital?
—You won the first prize in the last Physics competition once again. —__ _. I made several mistakes.
----Although he works hard, he makes___________..----In that case, he should improve his method of study.
--- What do you think of the football match?--- Wonderful! The Chinese football team has never played________.
The students stopped talking_________the teacher came into the classroom.