Identify the one underlined word or phrase that would not be acceptable in standard English

At the rate the clerks were processing the application, Rahim figured that it will take four hours for his to be reviewed.

$~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(a)$ $~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(b)$ $~~~~~~~~~~~~~~~~~~~~~~~~~(c)$ $~~~~~~~(d)$

Find out which quotation part of the following sentences has an error. He 'gave me' a ticket 'so that' I 'may visit' 'the' book fair

In questions 1 and 2, each sentence has four underlined words or phrases (A, B, C and D). Identify the word or phrase that must be changed in order for the sentence to be correct.

The girls $\frac{were ~sorry}{\left(a\right)}$ to $\frac{had\ missed}{\left(b\right)}$ the singers $\frac{when}{\left(c\right)}$ they $\frac{arrived}{\left(d\right)}$ at the airport.

Identify the underlined word or phrase (A, B, C, or D) that must be changed in order for the sentence to be correct (11-15)

The $\frac{equipment}{\left(A\right)}$ $\frac{in\ the\ office}{\left(B\right)}$ $\frac{was\ badly}{\left(C\right)}$ in need of $\frac{toberepaired}{\left(D\right)}$.

"It" is "the" dream of every "mountaineers" to climb the world's "highest" peak. "NO error."