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The manager ___ a rise in salary for ages,but nothing has ha

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The manager ___ a rise in salary for ages,but nothing has happened yet.
A.is promised
B.is promising
C has been promising
D promised
这里不用被动,排除AD,那么B为什么不对?如果B选项改为was promising正确吗?
The manager ___ a rise in salary for ages,but nothing has ha
c是现在完成进行时,从属于现在完成时.现在完成时表示过去的动作对现在造成的影响,换成has promised 是可以的.
was promising是过去进行时,从属于一般过去时.强调这种动作确实发生.
本题中有了后面一句But,暗示了动作和现在的影响之间的因果关系,所以选C,要换也是在现在完成时里边换.
The manager ___ a rise in salary for ages,but nothing has ha The company ___ a rise in salary for ages 求解释一道语法题The company ____ a rise in salary for ages,but nothi The company has rejected the workers’demands for a rise in p 68.A fool has gained nothing from the time ______,for he ___ There has been a _____ increase in the teacher's salary in r the rise in the cost of living has been the lowest for six m Everything __cheap in the small shop.A.has B.ha There ___ a river in front of the house but now it has turne the little boy has been gone for ages, We waited ages for a taxi.We gave up in the end and walked h there is nothing but a card in the box,( )there?