Question

— I didn’t know you were friends with Mr. Smith.
— We ______ each other for6 years.

A．knew

B．are known

C．have known

D．will know

Answer 1

C

试题分析：句意：我不知道你和史密斯先生是朋友。——我们已经彼此认识六年了。结合语境可知本句描述的是现在已经完成的动作。故选C。