单项选择题

Why were cracks in old houses not a big concern

A．Because indoor cleanness was not emphasized.
B．Because energy used to be inexpensive.
C．Because environmental protection was given top priority.
D．Because they were technically unavoidabl

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单项选择题

Which of the following statements is true

A．A storm surge is a dramatic increase in wind velocity.
B．A hurricane watch is more serious than a hurricane warning.
C．Falling air pressure is an indicator that the storm is increasing in intensity.
D．It is safe to go outside once the eye has arrive

单项选择题

Which of the following would be the best title for this passage______.

A．How to Avoid Hurricane Damage
B．Forecasting Hurricanes
C．The dangerous Hurricane
D．Atlantic Storms