5..........a large hole in the side of a mountain or under the ground. A. Waterfall B. Cave C. Bay D.lake 6.Household and garden waste is collected ….... compost. A To do B. To make C. To have D. To change 9. It is difficult to find …………at busy times in Da Lat. A. Accommodations B. Hotels C. Guest houses D. All are corrcet
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