One of my friends asked me to help him with his lessons this weekend, and thus __ my plan.
A．ruinedB．ruiningC．to ruinD．ruins
A
本題考查動詞形式。此題中and是并列連詞，連接兩個那個列成分asked和ruined，兩動詞形式和時態(tài)應(yīng)保持一致。
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