A. active B. passive C. negative D. positive
A. will see B. have seen C. see D. are going to see
A. will leave B. leave C. will have leave D. are leaving
A. Had...met B. Did...see C. Would...meet D. Have...seen
A. walked B. had walked C. was walking D. would walk
A. would be B. was to be C. has been D. had been
A. had turned B. will have turned C. have turned D. have been turning
A. would be built B. was building C. was being built D. had been built
A. must be sent B. will send C. ought be sent D. must send
A. is found B. found C. has been founded D. was founded