Question

—Why are you late, Jim?
—Because there _________ a lot of traffic when I came here.

A．is

B．are

C．was

D．were

Answer 1

C  

本题考查There be句型的时态。根据句意：“—Jim，你为什么迟到？—因为当我来这儿时，有许多车辆。”，原因发生在过去，而且traffic是不可数名词，本题应用is的过去式was。故选C。