_______flying is more expensive than land and sea travel, I went there by air to save time.
As the supermark_______, allthe goods are sold at half price.
He stood against the wall with his right hand _____.
The missing boys were last seen _____ near the river.
He gave me the phone number in order ______ contact him when we are in need of help.
You know that widely reading helps ______ your knowledge so I can’t help _____ the housework every day.