Sentence Correction

Hi guys,

I have some troubles with the following two sentences (see attachements)

For No. 23:
Can somebody please explain to me why "B" is NOT correct? In fact, "C" is the correct answer. But with C, I thought if a pronoun is written before its antecedent, it must be wrong because one does not know to what it refers!?


For No. 47:
Why is "A" correct but NOT "E"?? I cannot see a rule or something that makes A correct and E incorrect!? I see that A has a present participle (bringing) but what is the explicit rule when to use present (or past) participle and when not?
And why is E then wrong?


Answers are much appreciated!

Q 23. The usage of with is appropriate here rather than having its weight.
Only 2 option use with C & D.

'Is now' is required because we are showing contrast. D ends abruptly.
Hence, C is OA

But, I need the expert's help on this.
Suppose "is" is used before now in option D, will D, then be correct?

Q.47 Experts help needed!

For question 47, you might want to refer -> https://gmatclub.com/forum/usage-of-verb ... 35220.html#

123nobody321 wrote:Hi guys,

I have some troubles with the following two sentences (see attachements)

For No. 23:
Can somebody please explain to me why "B" is NOT correct? In fact, "C" is the correct answer. But with C, I thought if a pronoun is written before its antecedent, it must be wrong because one does not know to what it refers!?


For No. 47:
Why is "A" correct but NOT "E"?? I cannot see a rule or something that makes A correct and E incorrect!? I see that A has a present participle (bringing) but what is the explicit rule when to use present (or past) participle and when not?
And why is E then wrong?


Answers are much appreciated!