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【单选题】
They worry about grades.
A.
Causes of stress
B.
Symptoms of stress
C.
Ways to reduce stress
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参考答案：
参考解析：
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举一反三
【单选题】According to Bob, you should ___ on your first day of exercise.
A.
walk slowly
B.
start slowly
C.
run five miles
【单选题】According to Bob, you should ___.
A.
do exercise that you like
B.
do exercise that is easy for you
C.
go to the gym three times a week
【单选题】According to Bob, you should ___.
A.
go swimming and play soccer every week
B.
make a doctor's appointment before you start exercising
C.
write down exercise appointments
【单选题】Bob likes to ___.
A.
play tennis and swim
B.
swim and play soccer
C.
play tennis and soccer
【单选题】When you start exercising, you should walk___.
A.
twenty to thirty minutes a day
B.
five miles a day
C.
a few minutes a day