—Why are you late, Jim?—Because there _________ a lot of traffic when I came here.
----who ____the money and food to the people in the earthquake?-----some young people from Beijing.
---I have been to Qingdao before.----- .
—We really shouldn’t use plastic bags any more when shopping.—_____ It’s important to protect our environment.
—Our country ___progress in science and culture in recent years.
_____he is very tired , _____he still goes on working.