Car prices have been going down sharply in the last 20 years—It’s not surprising because the law of market ________ the price of a product

Show me your homework, Dave. —Sorry, Mrs Brown. I’ve _______ it at home.

Researchers are now conducting hibernation experiments and can use chemicals to put living cells into sleep-like state they don’t age.

In recent years much more emphasis has been put______ developing the students productive skills

_________ is well known to the peasants,pests continue to eat crops, damage.