问题
选择题
-Ten minutes ago, there __________ an eraser, a pen and some books on the desk.But now there __________ anything on it.
-Don't worry. Maybe someone put them away.
A. was, isn't
B. were, isn't
C. is, wasn't
D was, wasn't
答案
答案：A
考查动词的时态及主谓一致，根据句中的标志词可知前句是一般过去时，后句表达的是现在进行时的概念，故选A。