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________ or burn people and buildings near an erupting volcano. A. cover B. hide C. bury D. trap 8. The two of them never greet each other and behave ________ they were strangers. A. even if B. because of C. such as D. as if 9. We can either ________ some earthworms in my yard or buy some shrimps in the market. A. dig in B. dig out C. dig up D. dig into 10. Did you ask the guard ________ happened? Yes, he told me all ________ he knew. A. what。 that B. what。 what C. which。 which D. that。 that 11. The number of students in our school ________ about 30,000 and ________ students study hard. A. is。 a large amount of B. are。 the number C. is。 large amount of D. is, a large number of 12. I’m not easily ________, but his deed (行為 ) was too disgusting (可惡的 ). A. shocked B. interested C. surprised D. frightened 13. When young Henry came out of the Navy to join his grandfather’s pany, it was ________. A. on ruins B. at ruins C. in ruins D. under ru