【題目】We were having a picnic when _______ there came a downpour, which was really a wet blanket.

A. all at once B. in addition

C. in return D. as well

【答案】A

【解析】

試題分析：考查連詞辨析；A. all at once同時； 一起；突然；忽然；B. in addition另外，除此之外;并且; C. in return作為報答，反過來； D. as well也，還有；句意：我們正野餐的時候突然來了傾盆大雨，真是令人掃興。傾盆大雨忽然而至，故選A

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