Our principal, a mean old lady, ______ a travel for ages, but to our great disappointment nothing has happened yet.

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问题 Our principal, a mean old lady, ______ a travel for ages, but to our great disappointment nothing has happened yet.

选项 A、was promising
B、has been promising
C、has promised
D、promised

答案B

解析 动词时态题。这句话考查现在完成进行时。后面的分句用的足进行时,所以一致起见后面不能用过去时,排除选项D ,选项A 不合适,这里不能用过去时,因为与后半句的现在时不一致;从后一分句看出承诺到目前仍然没有兑现,如果不用完成进行时表“一直承诺”,则一定要用过去完成时,所以选项C 也不合适,正确答案为B 。
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