【题目】I came across a good friend of mine on the square the other day, but we didn't talk much because he ________ to catch the bus.
A.had rushed
B.was rushing
C.would rush
D.has been rushing

【答案】B
【解析】句意：前几天我在广场上遇到了我的一个好朋友，但是我们不多说话，因为他赶着赶公共汽车。根据句意可知句子用过去进行时态，故选B。