Michael loves scuba-diving (斯库巴潜水). By 9, he was an extraordinary swimmer and a good listener in the pool.

    Michael's first dive,____was truly unforgettable. Instead of using a boat, the plan was to go down a ladder at the boat and drop into about 15 feet of water. Everything went perfectly. His instructor Polly led him to the nearby reef. While ____ (explore) the reef in 27 feet of water, Michael suddenly signaled a problem with his mask. Polly signaled back for him to clear it. He cleared it ____then later signaled the problem again. His mask was completely flooded ____water. Michael made a sign ____ he wanted to go up. Polly signaled, “NO! Stay with me!”

    According to Polly, even though scuba ____(train) teaches new divers how to deal with flooded masks, many beginners panic the first time water fills their masks during an actual dive. Michael wasn't like many beginners, though. He didn't panic. He did ____ (exact) what he learned to do during his years. He stayed calm,____ (think) it through, and followed Polly's ____ (instruct). Polly gradually led Michael to shallower water in an area. The group swam together back to the shore for a celebration of Michael's ____(amaze) accomplishment.