Problem: Word: key

Sentence 1: Some students had stolen the key to the final exam.

Sentence 2: Some students cheated by using the answer key.

Same meaning?
A: the same meaning

Problem: Word: shade

Sentence 1: After several trials he mixed the shade of pink that she wanted.

Sentence 2: I've painted my room in five lovely shades of pink and chartreuse.

Same meaning?
A: the same meaning

Problem: Word: know

Sentence 1: I know it's time.

Sentence 2: She knew of our plan.

Same meaning?
A: the same meaning

Problem: Word: work

Sentence 1: Mastering a second language requires a lot of work.

Sentence 2: He arrived at work early today.

Same meaning?
A:
different meanings