--Do you know if he___to play basketball with us?--I think he will come if he___free tomorrowA.will come;will be B.comes;is C.comes;will be D.will come;is

问题描述:

--Do you know if he___to play basketball with us?
--I think he will come if he___free tomorrow
A.will come;will be B.comes;is C.comes;will be D.will come;is

D
第一个if指是否,动词应该还是随时态用将来时“will come'第二个if是引导条件状语从句,所以动词用一般现在时,而且主语是第三人称所以用“comes".