—Are your parents at home? —No they aren’t in. They to Beijing.A. has goneB. have goneC.

问题补充：

—Are your parents at home?

—No, they aren’t in. They to Beijing.

A. has gone

B. have gone

C. has been

D. have been

答案：

A. has gone

B. have gone

C. has been

D. have been

解析：

试题分析: 句意：你父母在家吗？不，他们不在家。他们已经去北京了。 Have been to ,曾去过某处但已经回来了，hasve gone to 去某处还没回来，可知答案选B。