now, lots of people searchfor products on the Internet but still buy them at stores. Internet shoppingwill really ____ when people are sure that it is safe.

I often have conversations with John over ______ telephone, while keep in touch with Tom by ______ letter.

__, the boy couldn’t enter his house

The media today can draw public attention to situations ______ help is actually needed.

21. Whether you believe what he said_________ what he does in the future.