求大神做英语十道名词从句!11.I really don't know _____A.I should do next

求大神做英语十道名词从句!
11.I really don't know _____
A.I should do next B.what should I do next
C.what I should do next D.how I should do next
12.I'm afraid _____.
A.the little girl will have to be operated on
B.that will the little girl have to operate on
C.the little girl will have to operate on
D.that will the little girl have to be operated on
13.She walked up to _____ .
A.where did I stand B.where I stood
C.I stood there D.where I stood there
14.Can you tell me _____?
A.who is that gentleman B.that gentleman is who
C.who that gentleman is D.whom .is that gentleman
15.We'll give you _____.
A.that do you need B.what do you need
C.whatever you need D.whether do you need
16.They want us to know _____ to help us.
A.what can they B.what they can C.how they can D.how can they
17.We must put _____ into practice.
A.what we have learned B.that we have learned
C.that have we learned D.what have we learned
18.Did she say anything about _____?
A.that the work was to be done B.how was the work to be done
C.that was the work to be done D.how the work was to be done
19.He was never satisfied with _____.
A.what she had achieved B.had what she achieved
C.she had achieved D.that she achieved
20.These photographs will show you _____.
A.what does our village look like B.what our village looks like
C.how does our village look like D.how our village looks like