I find this Math problem very ______. I believe students can work it out ______.

 ---How much money did you pay for the drink?---None. It’s ______.

“‘You will walk over the earth, and shall never have a home. You have done a very evil thing.’ God said to Cain.” What does the underlined word mean?

Usually we get ________ about something and end up _________ in Chinese. 

He finds watching English movies frustrating because the people speak too quickly.