Do good

Do good. Be beneficial for. e.g. People should exercise regularly. Exercise does you good.

Take off

Take off has many meanings, but one is "to become successful or popular, especially suddenly", e.g. This product was a huge success. The way it took off was really unexpected.

Answer to quiz: pros and cons

Question: I'm not sure what to do. I'll make a list of the ____________ and then decide.

Answer to quiz: go astray

Question: These measurements don't look right. My calculations must have ________ somewhere.

Answer to quiz: fit in

Question: "I sometimes find it difficult to _______ at social gatherings with my girlfriend's family".

Answer to quiz: drop a line

Question: "Let's meet for lunch next week. __________ and we'll sort something out".