Question

---Where was your sister at this time yesterday evening ?
---She was writing an e-mail ______ I was watching TV at home.

A．after

B．as soon as

C．while

D．until

Answer 1

C

試題分析：after在……之后；as soon as 一……就……；while當……時，強調兩個動作同時發生；until直到，常和not搭配使用。結合上文可知下文句意為：當我在家看電視時，她正在寫電子郵件。故選C。
點評：解答此類題型首先要直到每個連詞的基本用法，然后結合上下文關系選擇合適連詞，故平時加強閱讀分析能力是很必要的。