—I don’t like shopping.         — Me______. It makes me tired. 

He began to take political science ________ only when he left school. 

Mary is very clever and _____ worth teaching, but her brother is not. Look, he is now _____ asleep in class.

However _____ they are designed, pens should function as a tool to write with.

--Students should devote most of their time to studying rather than playing computer games.  ---________. No pains, no gains.