A．上海B．广州C．深圳D．北京
A. 上海
B. 广州
C. 深圳
D. 北京
A．dieB．be believedC．realizeD．fail
A. die
B. be believed
C. realize
D. fail
A．wantedB．workingC．preparedD．struggling
A. wanted
B. working
C. prepared
D. struggling
With what topic is the passage mainly concerned？
A. How the Sun evolved.
B. The structure of the Sun.
C. The high temperature of the Sun.
D. The great pressures of the Sun.
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