Explanation

Mahnoor is doing a project on solar systems.

**

 the preposition to use with "planet" is "on." 

Explanation

 The first pair of jeans was made by Levi Strauss in 1850.

***

 the above is related to the past tense by the indication of "1850" so we choose the "was made" option

"Was" is a past tense indicative form of be,

Explanation

We use "for" with a period of time in the past, present, or future.

We use since with a point in time in the past.

For refers to periods of time, e.g. 3 years, 4 hours, ages, a long time, months, years.

Explanation

What can be done about the environment?

ماحولیات کے بارے میں کیا کیا جا سکتا ہے؟

**

meaning of done:  adjective [after verb] (DEALT WITH)

Explanation

On the first day of Eid, I felt sick after I had overeaten

***

The above sentence is related to past tense by the indication of " had" so we choose the third form of verb " felt"

Subject + had + past participle (third form of the verb) + rest of the sentence.

Explanation

If the food is delicious, we will order more.

**

order means: to ask for something to be made, supplied, or delivered

'order" is best to keep the meaning of the original sentence

Explanation

I need a thread and needle to stitch the button that has come off

**

the meaning of come off: to be finished with or removed from something

Explanation

Here there are two statements which are Hurry means to complete the work fast and the other one is you will be late.

already is best to keep the meaning of the original sentence 

already means: used after a word or phrase to express impatience.

Explanation

Did you design the children's clothes for the party?

***

To show possession, you add an apostrophe to the end of 'children' and then finish with an 's': children's.

Explanation

"of" is used as a preposition here which means: expressing the relationship between a scale or measure and a value.

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