1. I have one full and one partial sentences from my QT book and am wondering if the definite article the is optional for both sentences.
... hold every thought captive to (the???) knowledge of Christ.
We are (the???) sons and daughters of God.
2.Which sentence is right? Or are they all right?
It will help them improve English.
It will help them to improve English.
Answering the call of God enables Him to work within us those things that are pleasing to Him.
Answering the call of God enables Him to work within us on those things that are pleasing to Him.