what ____ Jim do when it____? A.does;snow B.does;is snowing C.do;is snowingwhat ____ Jim do when it____?A.does;snow B.does;is snowing C.do;is snowing

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what ____ Jim do when it____? A.does;snow B.does;is snowing C.do;is snowingwhat ____ Jim do when  it____?A.does;snow B.does;is snowing C.do;is snowing

what ____ Jim do when it____? A.does;snow B.does;is snowing C.do;is snowingwhat ____ Jim do when it____?A.does;snow B.does;is snowing C.do;is snowing
what ____ Jim do when it____? A.does;snow B.does;is snowing C.do;is snowing
what ____ Jim do when it____?
A.does;snow
B.does;is snowing
C.do;is snowing

what ____ Jim do when it____? A.does;snow B.does;is snowing C.do;is snowingwhat ____ Jim do when it____?A.does;snow B.does;is snowing C.do;is snowing
因为Jim三单 所以排除C
when表示当……时 用现在时
排除A
选B

B 过去进行时

B 第一个是三单 第二个是正在进行时

B,这句表示一般情况,下雪的时候Jim做什么。Jim是第三人称,所以疑问句中助动词要用does,it指天气,也是第三人称,不能用snow,表示一般情况应该用snows,而进行时is snowing是正确的。