单项选择题

A．From rocks in the mountain.
B．From the remains of ancient sea life.
C．From the soil under the sea.
D．From ancient trees.
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单项选择题
A．Cathy likes having a picnic on a sunny day.B．Alan is expecting a gentle breeze to cool himself off.C．They haven’’t had much sunshine recently.D．Much to their surprise, bad weather is setting in.
A．Cathy likes having a picnic on a sunny day.
B．Alan is expecting a gentle breeze to cool himself off.
C．They haven’’t had much sunshine recently.
D．Much to their surprise, bad weather is setting in.
单项选择题
A．8. 5 hours.B．7. 5 hours.C．8 hours.D．9 hours.
A．8. 5 hours.
B．7. 5 hours.
C．8 hours.
D．9 hours.
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