Bob has learned a lot from his _______ of working in different gyms and is now an expert on all kinds of _______. 

According to the situation, they found three different ______ to the problem.

Here’s my card． Let’s keep in＿＿＿＿＿．

Johnson is an honest businessman. Our company and his have had a lot of ______ in the past few years.

—What’s your ________?           —I like collecting stamps.