Because no one had ever visited his house，I (266) ______ once walking up to the house with three or four other boys to see(267) ______ we could see what he did.
A.that
B.if
C.when
D.whom
正确答案是B
Because no one had ever visited his house，I (266) ______ once walking up to the house with three or four other boys to see(267) ______ we could see what he did.
A.that
B.if
C.when
D.whom
正确答案是B