trộn 500 ml dung dịch NaCl 1.3M với 300 ml H2O .tính nồng độ mol của dung dịch NaCl sau khi trộn

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3. We can't go on_______ like this. a. living b. live c. to live d. to be living 4. Don't keep_______ me while I'm talking. a. interrupt b. to interrupt c. interrupting d. to have interrupted 5. I can't imagine Bill _______ a motorbike. a. ride b. riding c. to ride d. to be riding 6. Sorry to keep you_______ so long. a. waiting b. wait c. to wait d. to have waited 7. She now regrets_______ it. a. say b. having said d. to say d. to have said 8. We decided_______ at home. a. to stay b. stay c. staying d. having stayed 9. Frank tends_______ too much. a. to have drunk b. drinking c. drink d. to drink 10. He doesn't want_______ a. to know b. know c. knowing d. to be knowing 11. I don’t advise anybody_______ in that hotel. a. stay b. to stay c. staying d. to have stayed 12. The mother made her child_______ the word a. repeat b. to repeat c. repeating d. to be repeating 13. My parents don't let me_______ out alone. a. go b. to go c. going d. to be going 14. I'm afraid I have some homework_______ today. a. do b. to do c. going d. done 15. Have the movers_______ the bedroom furniture first. a. brought in b. to bring in c. bring in d. bringing in 16. Do you know what_______ so many people evacuate their homes? a. forced b. made c. caused d. convinced 17. Where are the children? "I saw_______ in the yeard". a. them to play b. them playing c. they playing d. to them playing 18. You're been taking a lot of nice photographs. a. becoming b. about become c. to become d. about becoming 19. Jane's summer vacation in England led to_______ an English man. a. her marry b. her to marry c. her being married d. her marrying 20. We would like_______ to the president's reception, but we weren't a. having invited b. having been invited c. to have invited d. to have been invited