What impresses me most is _________ he appears in front of others, he wears a sincere and charming smile. A. which B. that C. where C. that whenever
People who often stay up too late are more likely to die of heart disease,________ a study.
He picked up an envelope________50 dollars in it.
I didn’t hear the phone. I ________ asleep.
—Does he know how to work out the problem? —Yes,he has ________ a good idea to solve it.
The trip will take about five months;it will be a long time ________ we meet them again.