1 Jenny------as an engineer-----half a year.

1 Jenny______as an engineer_____half a year.
A has worked;since B works;since C worked;for D has worked;for
2 Susan hasn’t written any postcards yet.I haven’t written them,either.(保持原句意思)
Susan hasn’t written any postcards yet._____ _____ I.答案Neither have
3How long has he _____there?
A left B been C gone D was

1、work是连续动词,不是瞬间动词,可以表示工作了一段时间,have·······表示完成时,for后面跟时间表示一段时间
2、Neither have I和so do I不同在于前者用于否定,后者用于肯定,表示与前面的情况一样
3、how long提问时间,be there 表示状态,前面有have,所以用been

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