Bài tập trắc nghiệm Unit 12 - Reading đọc hiểu có đáp án
4 câu hỏi
Read the passage carefully and choose the correct answer. The excitement of snorkelling in a clear tropical sea is hard to explain to someone who hasn't done it. If you expect to have the opportunity of trying it when on holiday, it is well worth bringing a snorkel if you can get hold of one. Experts now recommend a separate breathing tube. Many swimmers take a deep breath before diving with a snorkel. This is a mistake, because it makes the body so light that you dive with difficulty. It is best to take a couple of deep breaths and then a normal relaxed breath in order to breathe in enough for dive. Don't take repeated deep breaths before diving because this can lead to shortage of oxygen, which causes unconsciousness without warning. The backs of many snorkellers get badly burnt, for the snorkellers are so involved in the world below they forget about the dangers of sunburn. The sea does not protect your back from the rays of the sun, and it is best to wear a T-shirt. Snorkellers should also consider wearing shoes (or slippers), which may protect their feet from cuts from sharp rocks which can easily become infected.
What does the writer find difficult about snorkelling?
doing it in tropical seas
explaining the technique to a beginner
describing how exciting it can be
doing it for the first time
A swimmer should________before diving with a snorkel
take a deep breath
take two deep breaths
take repeated deep breaths
take much physical exercise
Why is taking a deep breath before diving a mistake?
You will not be able to dive deeply enough.
You will not be able to float properly.
You will use up too much oxygen.
You will lose consciousness.
The general impression of snorkelling the writer gives is that________.
it is extremely dangerous
many people who do it suffer from oxygen shortage
you have to buy special clothes in order to do it
most swimmers can learn to do it
