It’s fun to put up a Christmas tree.to 为什么不用for?

It’s fun to put up a Christmas tree.to 为什么不用for? It's very difficult to learn English well,but you can't___.a.put it up b.take it up c.look it up d.give it up it s fun to for a walk it s fun to for a walk ① __________ it is to visit China some day in the future!A.What a fun B.How fun C.What fun D.How a fun② What performance did you __________ at the party.A.put on B.put up C.put off D.put down It's a good habit to ___ all your things in correct place?A put away B put up C put off it's wise to have some money__for one's old age.A.put awayB.kept upC.give awayD.laid up It's a good place____A.have fun B.having funC.has fun D.to have fun it's fun to be it's cold outside.___your coat,please.a,put on.b,put in.c,put up.d,put out. It's time to get up.Please ________ your clothes.A. had B. has C. put on D. have 英语单项选择Mr.Smith uesd to smoke _______ but he given it up.A put off B put forwardC put up D put up with It's really a good place to have fun. It's fun to go for a walk.是什么意思 it’s+a+fun+to+make+snowmen+错在哪里 It's cold outside.You'd better () your scarf to protect your hair from the wind.A.wear B.cover C.put on D.put up 阅读理解 Put a little love in your life I remember growing up,my mom always said,Half the fun of doing anything is sharing it with other. It's so true.Friends and mates allow us to savor our success and our joys,comfort us in our challenging mo It's a fun to do sth.fun是不可数名词为什么还要加a?