How does indoor heating affect our life？
A. it makes us stay indoors more
B. it accelerates our metabolic rate
C. it makes us feel more energetic
D. it contributes to our weight gain
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The popular belief about obesity is that___________.
A. it makes us sleepy
B. it causes sleep loss
C. it increases our appetite
D. it results from lack of sleep
What is the current situation of hitchhiking？
A. It is popular in some parts of the world.
B. It is popular throughout the west.
C. It is popular in Poland.
Tim has failed three courses this semester, so he will have to _____ them next semester.
A. remake B. repeat C. reapply D. revise
Mr. Brown’s condition looks very serious and it is doubtful if he will _________.
A. pull back B. pull up C. pull through D. pull out
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