Question

My friend _________ me. I have to leave now.

A. waits for    B. waited for    C. is waiting for    D. was waiting for

Answer

C

【解析】句意：我的朋友正在等我，我现在必须要走了。waits for等待，是第三人称单数形式；waited for是一般过去时态；is waiting for现在进行时；was waiting for是过去进行时。根据句意I have to leave now可知，朋友正在等我，应用现在进行时，故选C。