Question

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

— 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。