30. —This wall of air is an effective answer to the problem and it ______ work. —But it is a question to put such a wall of air around the statue.
It is believed that if a book is________, it will surely________the reader.
_____ in thought completely, he didn’t even know what was going on.
The manager introduced the rules that she would like to see _______ the next year.
,Mom had a cup of coffee and a few minutes’ rest.
When why he behaved that way at table,he made no reply.