问题
选择题
It looks________you are ill.You should go to see the doctor.[ ]
A. as
B. as though
C. which
D. whether
答案
答案：B
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It looks________you are ill.You should go to see the doctor.[ ]
A. as
B. as though
C. which
D. whether
答案：B
为辅酶的胱氢酶的名称。