_ Frank solved the problem is not clear to us.A.If B.That C.

_ Frank solved the problem is not clear to us.A.If B.That C.How D.What

铁扯淡 1年前已收到4个回答举报

fei7779 幼苗

共回答了21个问题采纳率：85.7% 举报

C
is 前是主语从句,how Frank 是怎样解决问题的,我们还不清楚.
if 不能引导主语从句,可以用whether,
不缺成分,所以不能用that.what

1年前

水上的飞鸟幼苗

共回答了1224个问题举报

B Frank如何解决问题的，我们并不清楚
A if不能引导主语从句，改成whether即可。

1年前

lutianyu7301 幼苗

共回答了154个问题举报

选择C，
How引导主语从句是How Frank solved the problem
意思是：Frank 是怎么解决这个问题的我们还不怎么清楚。
希望帮到你！
欢迎追问！

1年前

sevenaldo 幼苗

共回答了63个问题举报

1年前

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