Fill in the blank with the suitable Modal. Since the books are with m…

The correct answer is Option (1) → C only

A. cannot — Incorrect.

• Can and be able to both express ability, so "cannot be able to" says the same thing twice and is ungrammatical.

B. should not — Incorrect.

• Should not expresses advice or duty.
• The sentence is about what is possible, not about duty.

C. will not — Correct.

• After a modal, be able to keeps its own form, and will not be able to states a future inability.
• The reason given by "since" is a real fact (the books are with the friend), so the plain future fits.

D. would not — Incorrect.

• Would not is used for an imagined or conditional situation (If I lent them, ...).
• The reason here is a real fact.

Complete sentence: Since the books are with my friend, I will not be able to lend them to you.

Contrast: "will not be able to" states a future inability based on a real fact. "Would not be able to" suits an imagined or conditional situation.

Tip: In this question the options do not follow the order of the statements (Option 1 = C only, Option 2 = D only, Option 3 = B only, Option 4 = A only). NTA often jumbles the options in this way, so after finding the correct statement, read the options carefully and mark the one with the right letter.