【H10】
A. moreover
B. however
C. besides
D. consequently
During its growth, how much of the water from the soil does the tree give off into the air
About ninety-nine percent.
B. About one percent.
C. About nine-tenths.
D. About one -ninth.
【H11】
A. arrive
B. hold
C. take
D. reach
Why may the repair process of the DNA finally fail？
A. Because shortwave radiant energy breaks the strands of the DNA.
Because the DNA may produce a colony of cancer cells.
C. Because enzymes work to rearrange the DNA into a new order.
D. Because the patient is exposed to UV from time to time.
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