Jack ________in the lab when the power cut occurred.
works
has worked
was working
would work
Research found that children who drank mainly soda were more than twice as likely as those who drank no soda _________ signs of aggression.
that the country leaders can lead them out of the financial problems, people are becoming more optimistic about the future of the country.
—Have you finished your homework? —Not yet. Now I regret the whole afternoon surfing on the Internet.
He can’t tolerate by her again and again during the report, so they quarreled at last.
______ the instructions very carefully when filling in the form.