A. swap B. biscuit C. border D. imperceptible A. tell jokes B. typical C. tiger D. adore A. high B. tangyuan C. cardboard D. climbing A. run B. charming C. secrecy D. historian A. comprehensive B. improbable C. save D. door A. frightful B. meteorologist C. jump D. greatly A. out of sight B. jam C. junior high school D. patronage A. temporarily B. pen friend C. climb D. hungry A. compost B. trouble C. forty-six D. vest A. favourite B. Roman C. grey D. faulty