问题
选择题
he said he would ring me up, but he didn’t ___my telephone number?
A．Has he forgotten
B．Must he forget
C．Must he have forgotten
D．Could he have forgotten
答案
答案：D
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he said he would ring me up, but he didn’t ___my telephone number?
A．Has he forgotten
B．Must he forget
C．Must he have forgotten
D．Could he have forgotten
答案：D