单选题
It"s reported that by the end of this month the output of cement in this factory ______ by about 10%.
A、
will have risen
B、
has risen
C、
will be rising
D、
has been risen
【正确答案】
A
【答案解析】
[解析] by the end of..是完成时的标志，其后的时间若已经过去，谓语动词则使用过去完成时；其后的时间若尚未过去，谓语动词则是将来完成时。
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