[考題] be supposed to 用法

[redvictory (如你所願)]

    When will you know about the party ?

    We __________ know by now.

    (A) are supposed to
    (B) were supposed to
    (C) supposed to
    (D) suppose

    答案是 B , 想問為什麼不是A

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◆ From: 125.227.234.1
→ mingweii:be supposed 一定發生在 now之前，所以用過去式
→ dunchee:http://www.learnersdictionary.com/search/now
→ dunchee:3) now (noun) -> 第3個例句
推 TouchAgain:假設語氣?