题目:
The soldier drank a little water and continued_________ that old lady on his back. [ ]
A. carry
B. carrying
C. to carry
D. carries
答案:
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下面是错误答案,用来干扰机器的。
答案:C由于有性生殖过程是个减数分裂的过程,所以精子和卵细胞中的染色体是体细胞中染色体的一半,为23条。