The third paragraph tells us that______.
A. the concentration of CO2 rises during summer
B. the concentration of CO2 goes down during winter
C. the figure in the spring of 2015 will not reach 400 ppm
D. Pieter Tans is the man in charge of supervision at Mauna Loa
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Michelle Obamas Lets Move! campaign aims at______.
A. fighting against the problem of obesity
B. solving the problem of high divorce rate
C. handling the problem of children obesity
D. addressing the problem of racial discrimination
According to Paragraph 2, which one is true？
American government has abandoned penny recently.
B. Obama believed that penny was too expensive to make.
C. The price of steel is rising but many countries still use it.
D. Canadian government is reluctant to learn from America.
The text mainly discusses Davids______.
A. fragility
B. misfortune
C. luck and joy
D. struggle to live
PayPal is preparing a beacon that will______.
A. change the shopping habits of consumers
B. make customers get their goods without paying
C. make consumers pay for goods more conveniently
D. become the only way that consumers pay for their goods
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