48.11
问题描述：
48.11
i never doubt__Jim will come to our help
a.if
b.that
c.whether
d.what
答
b.that
doubt后面可以跟两种用法,如果用在肯定句用whether/if,如果用在否定句就用that
题目中有never,所以是否定句,所以用b.that
相似的例子还有sure,肯定句用that,否定句用whether/if