Problem: Word: work

Sentence 1: This method doesn't work.

Sentence 2: The medicine works only if you take it with a lot of water.

Same meaning?
A: the same meaning

Problem: Word: return

Sentence 1: On his return from Australia we gave him a welcoming party.

Sentence 2: The average return was about 5%.

Same meaning?
A: different meanings

Problem: Word: burn

Sentence 1: Burn garbage.

Sentence 2: The car burns only Diesel oil.

Same meaning?
A: the same meaning

Problem: Word: use

Sentence 1: There is no use for your invention.

Sentence 2: He warned against the use of narcotic drugs.

Same meaning?
A:
the same meaning