问题
选择题
He________ full marks, but he was so careless as to make a spelling mistake.[ ]
A. must have gained
B. might gain
C. could have gained
D. must gain
答案
答案：C
搜题请搜索小程序“爱下问搜题”
He________ full marks, but he was so careless as to make a spelling mistake.[ ]
A. must have gained
B. might gain
C. could have gained
D. must gain
答案：C