---Do you know what Tom does all day? ---I know he spends at least _______ time watching TV as he does spend doing his lessons.

It is a fact that _________ differences between countries may cause misunderstandings in communication.

 You should look _______ into the matter to get more information about it.

Mrs O’Neill asked ＿＿questions and she didn’t scold us either.

 It is said that sandstorms will become more ________ as a result of global warming.