单选题 According to the woman, what happens to many people when they try to lift heavy things from the floor?

A、 They may lose the back part.
B、 They may strain their muscles.
C、 They may find it easier to lift one by one.
D、 They may call someone to give a helping hand.

【正确答案】 B

【答案解析】解析：事实细节的找寻和判断。根据原文Many people hurt their backs when they try to lift heavy things from the floor．It is easy to hurt your back muscles when you try to pick up a heavy object可知许多人试图将地上的重物举起时会伤着背部。将重物从地上拾起很容易使后背肌肉受伤。由此可见B“他们会拉伤肌肉”与原文意思相符，因此该项为正确答案。

单选题 In order to lift something from the floor correctly, which part of your body should be kept straight?

A、 The back.
B、 The abdomen.
C、 The knees.
D、 The legs.

【正确答案】 A

【答案解析】解析：事实细节的找寻和判断。根据原文To lift some thing from the floor correctly，first bend your knees and squat down． Keep your back straight可知将地面上东西正确举起，应先弯曲膝盖蹲下身来，使后背保持正直。由此可见A项与原文意思相符，因此该项为正确答案。

单选题 What else should you do when you squat down to lift a heavy object?

A、 Put your knees in front of the object.
B、 Keep your legs straight and forward.
C、 Get as close to the object as possible.
D、 Bend over the object from your waist.

【正确答案】 C

【答案解析】解析：事实细节的找寻和判断。根据原文As you squat down，try to get as close to the object as possible可知蹲下身时尽量接近物体。由此可见C项与原文意思相符，因此该项为正确答案。

单选题 What muscles should you use if you try to stand up with the heavy object?

A、 The waist muscles.
B、 The leg muscles.
C、 The back muscles.
D、 The hip muscles.

【正确答案】 B

【答案解析】解析：事实细节的找寻和判断。根据原文Use your leg muscles in order to stand up．In other words，lift with your legs，not with your back可知站起时要用腿部肌肉，换句话说，举重物靠的是你的腿而不是你的后背。由此可见B项与原文意思相符，因此该项为正确答案。

单选题 Which of the following is NOT a correct way of lifting heavy objects?

A、 Keep your knees and legs apart.
B、 Squat down directly in front of the object.
C、 Lift the object slowly.
D、 Spread your arms instead of your hands.

【正确答案】 D

【答案解析】解析：事实细节的找寻和判断。根据原文if you are going to pick up a heavy box，squat down directly in front of it可知B项说法是正确的；根据To lift the object，you should stand up slowly可知C项说法是正确的；根据Maybe you will have to spread your knees and legs可知．A项说法是正确的。因此D项为正确答案。