从方框中选择适当的引导词填空，其中有三个词是多余的。when, that, how, what, whose, if, why, whether

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从方框中选择适当的引导词填空，其中有三个词是多余的。

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when, that, how, what, whose, if, why, whether

1. why 2. whose 3. what 4. whether 5. that

No one knows _______ next.

[ ]

A. how to do
B. what to do
C. when to do
D. why to do

I don’t know what kind of pet ______.

[ ]

A. getting
B. to get it
C. should I get
D. I should get

No one knows ______ next.

[ ]

A. how to do
B. what to do
C. when to do
D. why to do

"X plus Y is more than Fifteen percent." This sentence can also write as "_____"

[ ]

A. X+ Y＞15%
B. X+Y≥15%
C. X+Y=15%
D. X+Y＜15%

No one knows ________________ next.

[ ]

A. how to do
B. what to do
C. when to do
D. why to do