Question

(2005蘇州市)

--- Did you see the traffic accident yesterday?

--- Yes. It happened when I ________ past the museum.

[　　]

A．walk

B．a(chǎn)m walking

C．will walk

D．was walking

Answer 1

答案：D
解析：

考查前后時態(tài)一致。由句中happened及句意可知D項正確。