20. All the food in the house ________ by someone because there is no food now. A. has been eaten B. had to be eaten C. must have been eaten D. should have been eaten 21. The laws of physics ________ when we provide these mathematical proofs. A. will soon be altered B. be soon altered C. soon will be altered D. will soon altered 22. I am sorry, I can't come with you. I ________ to that party. A. wasn't invited B. invited C. am invited D. don't invite 23. William Shakespeare ________ as the one of the greatest writers in English literature history. A. knew B. has known C. was known D. is known 24. Over a million dollars in cash ________ from a bank in Los Angeles. A. stole B. has been stolen C. have stolen D. have been stolen 25. I'll have to go by bus as my car ________. A. was being repaired B. is repaired