He lacked the strength to deal with all these problems.（）
A. think of
B. talks about
C. copy down
D. cope with
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Once we have got enough to feel safe,money does not make_____________ difference
How many mice were compared in Spindler's experiment in one group？
请选择（11）处的最佳答案
A. walking
B. running
C. activities
D. eating
A few simple facts will help you keep cut flowers______________
A. by keeping its original shape and colour
B. in the life of cut flowers
C. to produce carbon dioxide
D. for as long as possible
E. by controlling temperature
F. to replace the water and solution every day
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