Thisstreetisverycrowdedatthistimeofday.Youhavetobeveryc...

問題詳情：

This street is very crowded at this time of have to be very cautious while ______.

   A．to drive     B．being driven         C．driving                 D．having driven

【回答】

C

知識點：非謂語動詞

題型：選擇題