I posted the letter a week ago. — Then they________the letter by now. It usually takes four days.[ ]

It’s a good way to ____ your products on the Internet if you want to attract more customers.– Sounds great!

We ____to be treated respectfully as we have beeninvited as honoured guests.[ ]

_____ close parents are to their children has a strong influence on the character of the children[ ]

the crowded bus ______, who was dressed in ablack suit, waving to a woman.