Professor Black has us ________ compositions every day()
A.to write
B.write
C.written
D.writing
A.to write
B.write
C.written
D.writing
A.A story has been changing since it first appeared in the 1930s.
B.A person remembers a story for many years.
C.A gene is passed on through many generations without changing.
D.A song quickly becomes popular all over the world.
B.using more efficient light bulbs and home appliances
C.using appliances less often
D.using less fertilizer and pesticides
B.had difficulty in picking out the partners
C.had no chance to make the right judgements
D.did better with the first group than with the second
B.always keep the cooker half full
C.never leave the cooker empty
D.never turn off the stove
B.The Wonder Garden
C.Belgrave Hall Evening Talk
D.Jewry Wall Homework Help
B.跳板原则
C.例外原则
D.标准化方法
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