11:D
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A:number of has not have: A out

B: enrollment, with a number of..., reaching: awkwardB:

C: students have grown in number? awkward

D: ok, number of..has, at 47 million, has reached, all fine

E: Same issue as C

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10:C
The new image ... as systematic ...rather than as

So only B and C are contenders:

B: systematic as an adjective need an adjective such as mere rather than adverb merely, which following Germany is incorrect as it refers Germany while logically it should refer the new image. It further needs includes rather than include whether it refers to Germany or new Image

C: Ok, every problem is solved, S+V agreement(that includes) parallelism( as rather than as) and that precisely refers to what it should refer.

5.A
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like vs such as since examples are introduced B and D out. the possibility of what...in E simply nonsensical.

Out of A and C: the purpose with to pursue requires a noun clause telling what to expect, A precisely do that.

Thanks a lot.

11. unfortunately i dont find B awkward
10 and 5: I wish they were correct ans. as I picked same answers but OAs are different. will post OA after some discussion

Thanks again

In problem 2, i.e. file 10.jpg:
in option C, its given that "found in Germany that"
As we know, if it were "found in Germany which",
it would have been incorrect as 'which' modifies Germany. Is same case with option C? Is 'that' modifying Germany?

Plz help