单项选择题
This fire extinguisher is to be used only in case of（）
A.urgency B.crisis C.immediacy D.emergency
单项选择题 Many（）shops will be forced to close if the new supermarket is built.
单项选择题 — My birthday is tomorrow. —（）
单项选择题 Oil is an important（）material which can be processed into many different products, including plastics.
