Modifiers (that or whom CAN or MUST be dropped?)

[paty.mogollon]

Hello,

I have a question about an explanation on the MGAMAT, "Sentence Correction"book, page 87.

That or whom CAN be dropped when the modified noun is the object of the modifying clause.

Wrong: The movie THAT we watched las Friday was scary.
Right: The movie THAT we watched las Friday was scary.

My question: That or whom CAN or MUST be dropped when the modified noun is the object of the modifying clause?

1. If it CAN be dropped, why the last example is wrong?
2. If it MUST be dropped, why the following example (from the MGMAT "Sentence Correction"page 87) is right?

Right: The security guard WHOM we met was nice.

Thank you in advance.

Regards,
Patricia

[RonPurewal]

Hi,
This is the wrong folder for this question. Please post it in the MGMAT non-CAT folder. Thanks.

Also, please double-check the strategy guide reference. Right now, you have exactly the same sentence listed as "right" and "wrong".

[paty.mogollon]

Hi,

Thank you for the support and your comment. And I am sorry for the confusion, it is my first post.

How can I delete it from this folder?

[RonPurewal]

Just go ahead and post again in the correct folder. We'll take care of this one.

Thanks.