Plesae help from english to do all

First parts only: Not accustomed to unit of math teachings

B: It's more effective to use colored chalk

C: Its difficult to memorize all of these relations

D: It's essential to distinguish the elements of the elements of a set from the "non-elements."

E: It's important to point out that elements of a set need be individual, but may themselves be sets.

F: It's impossible to determine the exact image in that case.

G: It's desirable to have a more simplified system of notation.

H: It's clear to see that the meaning of an expression depends on its context.

I: It's compulsory to give your full name.

J: It's necessary to do the measuring as accurately as possible.

K: Its permissible to cut [=] into 2 or 3 parts.

It's impossible to read your writing.

It's useful to use a heating pad.

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It's silly to get upset over small things.

It's difficult to solve this equation.

It's important for your health to drink lots of liquids.

Its unfair to criticise him.

i have heard the mermaids singing, each to each.

i do not think they will sing to me

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