____ has been proved again and again that ____ is said in the ads greatly affects people’s impression of the products.
--Oh, I __________my passport! --Don’t worry. We have time to go back home and get it.
While looking for some personal documents, I happened to see an album __________some old photographs.
It is more important than ever to develop one’s maths, science and computer skills _______technological change is accelerating.
_______ patient when you argue with someone who is not so reasonable.
What’s up, Bill? You __________upset.