Seeing the chemical ________ to the sunlight, Mr. Lee warned the workers to be careful when dealing with it.
If he had started at nine o’clock,hehave been in London by eleven o’clock.
Jack,you’re so lazy!This jobhours ago.
Hehave come here yesterday,he?
At last hefinish the work ahead of time.
—Is the flight from Shanghai on time? —Of Course,it is.Itbe arriving in 10 minutes at Gate 9.