There are thirty sentences in this section. Beneath each sentence there are four words or phrases marked A, B, C and D. Choose one word or phrase that best completes the sentence.
Mark your answers on your answer sheet.
With all this work on hand, he _______ to the cinema last night.

A．To describe the glassmaking process.
B．To summarize the economic role that glassmaking played in colonial America.
C．To compare glassmaking in different parts of colonial America.
D．To give an example of a site of early American glass manufacturin

A．heat in urban areas can be reduced
B．the conclusions of the investigation in Sheffield were wrong
C．its heat production is smaller than that of Berlin
D．human-made heat can exceed the solar energy that reaches the ground in winter