问题补充:
—What were your parents doing when you phoned me last night?
—They with my grandparents.
A. were talking
B. talked
C. are talking
D. talk
答案:
(答案→)A. were talking
B. talked
C. are talking
D. talk
解析:根据上句中的were doing可知,本句也应该是过去进行时,故用were talking。本句的意思是“他们正和我的祖父母谈话。”所以本题选A。