--------Have you asked somebody to repair the machine?

--------Oh, sorry, I forgot it. I _________for an engineer at once.

--What kind of job have you ever done before?

--Oh, I _________ for an engineering company for three years,

A. work          B. have worked      C. worked          D. had worked

--It’s a pity that you didn’t come to my birthday party last night.

--I’m terribly sorry. I ________ for an important lecture.

A. prepared       B. was preparing

C. had prepared      D. has prepared

I ______ for an hour but he still ______.

　 A. have been waiting; hasn’t turned up 　　　　 B. have been waiting; didn’t show up

　 C. have been waited; hasn’t turned up　　　　 　 D. have been waiting; wasn’t turned up

 --------Have you asked somebody to repair the machine?

   --------Oh, sorry, I forgot it. I _________for an engineer at once.

   A. am going to send                  B. would send

   C. have sent                        D. will send