11. Mark hasn't returned _______________ . I wonder where he is. A. already B. ever C. never D. yet 12. Some people believe there is a(n)______________force at work in the university. A. strange B. unexplained C. exact D. brave 13. The sea monster _______________under the waves and nobody saw it again. A. saved B. pushed C. assassinated D. disappeared 14. The _______________ marched 100 miles in four days. A. refugees B. enemies C. soldiers D. dragons 15. The bird______________ above their heads. A. hovered B. conquered C. chased D. marched 16. He invaded my _________________when he looked at my diary. A. freedom B. privacy C. right D. citizenship 17. Don't lie to him or he'll get________________. A. angry B. confused C. surprised D. terrified 18. One day, a young man decide to _________________for the hound. A. buy B. attack C. trick D. search 19. Have you heard about the UFO _______________ last night? A. sight B. sighting C. sightseer D. sightseeing 20. The king took _______________of rebel country. A.control B. power C. right D. rule Cứu em với