I have not seen you for ages.(同義表達(dá)）
I have not seen you for（a）（long）（time）
for ages = for a long time很久,很長(zhǎng)時(shí)間.
I want to choose blue as my bedroom colour.(同義表達(dá)）
(I’d) (like) to choose blue as my bedroom colour.
want = would like 想要.
Has your school magazine been published yet?(同義表達(dá)）
Has your school magazine (come) (out) yet?
come out = be published 出版,發(fā)表.
We have not been told what to do next.(同義表達(dá)）
We have not been told what (we) (should) (do) next.
對(duì)that提問(wèn)一般用what,有時(shí)也可用用who,具體問(wèn)題具體分析.
one day = some day）有一天；總有一天；有朝一日.
而in future 表示“今后,往后”,與one day 并不是一對(duì)近義詞.