A、  B、  C、  B(A)注意satisfactory和factory的部分发音相似。(B)这是同意对方提议的时候经常使用的回答，所以正确。(C)对方让打电话，说昨天已经拜访过了，这个回答是不合适的，通过visit的反复

What is the charge for express shipping?
(A)It depends on the weight.
(B)It will take two days by express.
(C)Kevin is in charge of the shipping.

Why don’t you call them before you visit their factory?
(A)Yes, it is very satisfactory.
(B)That’s a good idea.
(C)Yes, I visited them yesterday.