問題詳情：
—How did you get in touch with the travel agent, Robin?
—Oh, that’s easy. I surfed the Internet and then called one ________ the telephone number is provided.
A. which B. in which C. of which D. whose
【回答】
C. 因爲of which引導定語從句，並在從句中作定語。of which the telephone number = whose
telephone number。
知識點：定語從句
題型：選擇題
