When it is impossible for boats to pass up and (below-down-of-over) the Thames

My older brother is writing(essay-a essay-the essay-an essay)

find the mistake:

I finally find the woman that Charles has fallen in love with her.

Nada's Parents are very easy-going.They let her to do what she wants.

down
an essay
تحذف her
do بدلا من to do

الجملة الثانية an essay كما هى كده ولكنها فى كتاب النماذج لها تكملة واختيارها الصحيح the essay

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الجملة الثانية لها تكملة
بدون her لوجود that
اما do أو allow بدل من let