Mr Smith with his parents ______ China since two years ago.A .have been in B has been C has been to说明理由

问题描述:

Mr Smith with his parents ______ China since two years ago.
A .have been in B has been
C has been to
说明理由

选C
首先这句话有since应该用现在完成时,其次这句话主语是Mr Smith,with只是伴随状语,不能同时做主语,因此主语视为第三人称单数,不能选have,要选has
最后,去中国have been to ,后面中国是名词,要用介词to,
所以综上,选C