5. We will have a seven days' vacation.
我們會有7天的假期。
還能這樣說：
A seven days' vacation is given to us soon.
We're going to have a vacation for seven days.
諺語：
Don't praise the day until evening.
尚未成功之事，不可譽之過早。
6. I'm trying to figure out where to go to travel now.
我正考慮去哪兒旅行呢。
還能這樣說：
I am thinking about the right place to travel.
Which place is right to go to travel is under my consideration.
應用解析：
make a brilliant figure 嶄露頭角；放異彩，引人注目，超群出眾；
cut a poor figure 出丑；露出可憐相；顯得很不像樣
7. Could you take care of my plants while I'm on vacation?
我去度假的時候，你可以照顧我的花草嗎？
還能這樣說：
Would you like to look after my plants when I am on vacation?
Would you like to watch over my plants during my vacation?
應用解析：
a good long while 長久；
a little while 不久，一會兒；
a while ago 剛才；
all the while 始終，一直；
between whiles 間或；
make it worth sb.'s while 酬謝某人，賄賂某人
8. You can join in the group tour we organize.
你可以加入我們組織的旅行團。
還能這樣說：
You can take part in our group tour.
You can go to tour together with our group.
應用解析：
join hand in hand 同心協力；
join oneself to 加入；歸入；
join up with 匯合；
join...together 把……連成一體；
join up 參軍；把……連接起來