A. invented B. has invente C. invents D. had invented
A. was looking B. am looking C. has been looking D. had been looking
A. did you see B. have you seen C. had you seen D. were you see
A. was waiting, arrived B. has been waiting, arrived C. has waited, arrived D. was waiting, was arrived
A. did you go B. had you been C. have you gone D. have you been
A. went B. had gone C. has gone D. was going
A. I'll be B. I am going to be C. I will have been D. I am
A. will spend B. will be spending C. will have spent D. is spending
A. are you going to paint B. will you paint C. will you have painted D. do you paint
A. We'll have B. We'll be having C. We'll have had D. We'll having
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