Question

Not only             , but I learned some knowledge.

A．did I help other people	B．do I helped other people
C．I helped other people	D．helping other people

Answer 1

A

試題分析：not only…but （also）是“不但……而且”的意思。當(dāng)其放在開頭時，應(yīng)該用倒裝結(jié)構(gòu)。故應(yīng)排除CD；根據(jù)后句的時態(tài)可知，本句也應(yīng)該用過去時。所以本題選A。
點評：本題需要從兩個方面加以考慮：一個是not only…but also的倒裝用法，一個是本句的時態(tài)問題。