A. lower B. come out of C. place D. navigation A. erode B. tons of C. dacing D. bee A. hover-train B. long jump C. a great number of D. premise A. tableland B. stitch C. roller coaster D. eel A. sensation B. rigid C. threat D. different A. magic B. dune C. hush D. so A. right B. crust C. Cairo D. best wishes A. baggage B. dredge C. bookworm D. think A. typewriter B. expedition C. pay for D. the greenhouse effect A. terrace B. else C. deck D. distribute