21. About 15,000 years ago, northern Wisconsin ______ under ice a mile deep.
A. buried B. was burying C. was buried D. had buried
22. Edward was new on the job, but he quickly fit himself into the ______ routine of the office.
A. established B. establishing C. establishes D. establish
23. The Mayan Indians ______ an accurate and sophisticated calendar more than seven centuries ago.
A. were developed B. developed C. are developed D. have been developed
24. George is ______ Lisa.
A. marry with B. marry to C. married with D. married to
25. The rescuers ______ for their bravery and fortitude in locating the lost mountain climbers.
A. were praised B. praised C. were praising D. praising
26. When I woke up and looked outside, the landscape had changed. The ground had been lightly ______ with a dusting of snow during the night.
A. covering B. cover C. covers D. covered
27. We can't even walk in the storm. Let's wait in the hallway where we'll be ______ the strong winds until things quiet down.
A. protected from B. protected by C. protecting from D. protecting by
28. "______ about the eight o'clock flight to Chicago?" - "Not yet. "
A. Has been an announcement made B. Has an announcement made
C. Has an announcement been made D. Has been made an announcement
29. Last night a tornado swept through Rockville. It ______ everything in its path.
A. destroyed B. was destroyed
C. was being destroyed D. had been destroyed
30. Be sure to wash the vegetables throroughly. A lot of pesticide residues ______ on unwashed produce.
A. can find B. can found C. can be found D. can be finding
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Sinh Học lớp 12
