頂級菜的問題：請各位看看怎麼翻譯

問個頂級菜的問題。
長時間不接觸英語，今天突然想起來只有

Only if you're clear of your enemy's intentions, you may proceed with the next step.

收到，謝謝！

看來姐姐比我快啊！ 五一沒有休假馬？

banzhu jj/mm, please translate the chinese into english--no chinese alone in conversation... [:448:]

you can't play the computer game before you finish your homework. [:495:]

ah bian: i'd like to invite you come to visit taiwan.
jingtao: i will come provided that you agree taiwan is part of china. (i won't come until you agree upon...)  [:493:]

看來姐姐比我快啊！ 五一沒有休假嗎？

五一沒有放假, 不過周四放了個什麼假. 呵呵!

我本來不敢來獻醜呀, 不過看你們都不在, 沒有人回, 所以只好啦.  [:798:]  [:475:]

"rovided that" is suitable for written English, "only if" if better.