What are the answers this in English language

Here are the answers to the questions:

• Question 14:

  $$\boxed{\text{B. waste}}$$

• Question 15:

  $$\boxed{\text{A. ferried}}$$

• Question 16:

  $$\boxed{\text{A. tools}}$$

• Question 17:

  $$\boxed{\text{D. mangled}}$$

• Question 18:

  $$\boxed{\text{B. gap}}$$

• Question 19:

  $$\boxed{\text{A. invariable}}$$

• Question 20:

  $$\boxed{\text{A. bill}}$$