-- tom do you know if sam --- to my party next week -- l think she will come if she --- freea\ comees ; will beb\ will come ; isc\ comes isd\ will come ; will be 请说明理由好吗?

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-- tom do you know if sam --- to my party next week -- l think she will come if she --- freea\ comees ; will beb\ will come ; isc\ comes isd\ will come ; will be 请说明理由好吗?

-- tom do you know if sam --- to my party next week -- l think she will come if she --- freea\ comees ; will beb\ will come ; isc\ comes isd\ will come ; will be 请说明理由好吗?
-- tom do you know if sam --- to my party next week -- l think she will come if she --- free
a\ comees ; will be
b\ will come ; is
c\ comes is
d\ will come ; will be
请说明理由好吗?

-- tom do you know if sam --- to my party next week -- l think she will come if she --- freea\ comees ; will beb\ will come ; isc\ comes isd\ will come ; will be 请说明理由好吗?
B
因为:
do you know if sam --- to my party 你知道sam明天会来我的生日晚会吗,if 引导宾语从句,表示:“是否”,“他是否会来”要用 “if sam will come
she will come if she --- free.意思是:“如果她有时间,她会来的”,if 引导条件状语从句,表示:“如果”,在表示将来的条件状语从句中,谓语动词用一般现在时态,所以用“is free ”.因此综合2个空格考虑,应该选择B.