Here are the correct answers for each question:

**Question 1:** The continued supply of arms to the region will only **worsen** the situation.
**Answer:** A. worse (Correct form should be "worsen".)

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**Question 2:** His bagless vacuum cleaner soon became a **bestseller**.
**Answer:** D. bestselling (Correct form should be "bestseller".)

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**Question 3:** You can receive a home loan of up to 95 percent of the official **valuation** of the property.
**Answer:** C. valuate (Correct form should be "valuation".)

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**Question 4:** She **suffers** terribly in the winter when it's cold and her joints get stiff.
**Answer:** B. terrible (Correct form should be "terribly".)

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**Question 5:** If you are a young, inexperienced driver, it is worth **having** comprehensive insurance.
**Answer:** A. to have (Correct form should be "having".)

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**Question 6:** You have to **take** the bad with the good in any career.
**Answer:** A. take (Correct answer.)

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**Question 7:** Ending a relationship is always hard but in this case it's for the **best**.
**Answer:** B. best (Correct answer.)

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**Question 8:** When I said I loved you, I meant it from the **bottom** of my heart.
**Answer:** C. bottom (Correct answer.)

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**Question 9:** He can't forgive her for doing the **dirty** on him and having an affair with his best friend.
**Answer:** A. dirty (Correct answer.)

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**Question 10:** The computer manual was as clear as **mud**, so we stopped reading it.
**Answer:** B. mud (Correct phrase is "clear as mud".)

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**Question 11:** She got to the gate ten minutes before her flight, so she was cutting it very **fine**.
**Answer:** C. fine (Correct answer.)

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**Question 12:** I tried to imagine my mother as a **fresh-faced** young woman.
**Answer:** A. fresh-faced (Correct answer.)

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Let me know if you need further assistance!