John _____ there since the year before, so he ______ them. A: had worked...knew B: had worked...had known C: worked... knew D: worked...had known

— I failed again. I wish I _________ harder. A: had worked; hadn’t B: worked; don’t C: had worked; didn’t D: worked; didn’t

By the end of last week, he ________ in the company for 10 years. A: had worked B: had been working C: will have worked D: would have worked

She had worked as a secretary

The workers _____ busily when the boss came to look for something he ______ in the office. A: had worked, had left B: were working ; had left C: working ; had left D: had worked; left

If you ________ hard, you ________ in the exam. A: worked/ wouldn't have failed B: had worked/wouldn't fail C: had worked/wouldn’t have failed D: worked/wouldn’t fail

Joanna was tired. She ____ all day. A: works B: worked C: has worked D: had worked

She____ here for about five years. A: has worked B: worked C: had worked D: works

By six o’clock they ______ twelve hours. A: worked B: have worked C: had worked D: will work

If she had worked harder,she __________.