Các bạn giúp mình với ạ ! Cảm ơn các bạn nhiều!! Khoanh vào đáp án đúng ( modal verbs) 1 she spoke in a low voice, but I....... What she was saying A.can understand. B. Could understand. C. Were dbleunderstand D. Could have under stood. 2 . Robert arrived without his books. He......it. A. Could has lost B. Would have lost c. Should have lost D. Will have lost. 3.Where đó you think roony is to day ?. " I have no idea he........ late". A. should have left b. would sleep c. would have sleep d. may have sleep 4 .The photos are black. The X-ray at the airport ______ them a. should have damage b. would have damagec. would damage d. must have damage 5. The children _________ “thank you” to you when you gave them their gifts a. will have said b. should have saidc. must say d. should say 6. Jean did very badly on the exam. She _________ harder. a. must have studied b. could have studiedc. sholud have studied d. must studied 7. These two boys are identical. They _________ twins. a. must have been b. should be c. must be d. should have been 8. Had we known your new address, we _________ to see you. a. came b. will come c. would have come d. would come