We've already sent out the invitation cards, but we don't know how many people.

A. is stoping B. stops

C. will stop D. shall stop

A. have been tested B. had been tested

C. were tested D. had tested

A. have been tested B. had been tested

C. were tested D. had tested

A. didn't ever meet B. have never met

C. have ever met D. never met

A. to get B. shall get

C. will get D. will have gotten .

A. to get B. shall get

C. will get D. will have gotten .

A. to get B. shall get

C. will get D. will have gotten .

A. waited B. was waiting

C. has waited. D. had been waiting .

A. waited B. was waiting

C. has waited. D. had been waiting .

A. will work B. works

C. will have worked D. has worked