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    - I’d like to invite you to a party tomorrow evening. - Thank you, but I’ll be free I’m uncertain. A. while B. if C. when D. whether 【查看更多】

     

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    -- I'd like to invite you to a party tomorrow evening.

    -- Thank you, but ______ I'll be free I'm uncertain.

    A．while

    B．if

    C．when

    D．whether

     

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     -- I'd like to invite you to a party tomorrow evening.

    -- Thank you, but ______ I'll be free I'm uncertain.

    A. while                      B. if                   C. when               D. whether

    查看答案和解析>>

     -- I'd like to invite you to a party tomorrow evening.

    -- Thank you, but ______ I'll be free I'm uncertain.

    A. while                      B. if                   C. when               D. whether

    查看答案和解析>>

    -- I'd like to invite you to a party tomorrow evening.

    -- Thank you, but ______ I'll be free I'm uncertain.

    A. while                          B. if                      C. when                 D. whether

    查看答案和解析>>

     -- I'd like to invite you to a party tomorrow evening.

    -- Thank you, but ______ I'll be free I'm uncertain.

    A. while                      B. if                   C. when               D. whether

    查看答案和解析>>


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