Sam do you know when Alice to my party ?-I think she will come when she free .A. c

问题补充：

--- Sam, do you know when Alice to my party ?

---I think she will come when she free .

A. comes; is

B. comes ; will be

C. will come ; is

D. will come ; will be

答案：

A. comes; is

B. comes ; will be

(答案→)C. will come ; is

D. will come ; will be

解析：句意：你知道爱丽丝什么时间来我的聚会吗？我认为如果她有空她就回来。第一句是宾语从句，主句是一般现在时，从句根据需要用将来时。第二句是时间状语从句，主将从先，故选C。