A. muzzle B. economic C. sign D. at least A. put up with B. athlete C. schoolwork D. sparrow A. instalment B. tangyuan C. park D. natural A. deception B. skin C. solve D. keep in order A. phrase B. remote control C. vehicle D. pot-holing A. steam B. beaten track C. form D. degree A. mess B. of course C. had better D. in cash A. charity B. topical C. urge D. phonetics A. whisper B. carve C. go to school D. earn A. weak B. recovery C. as well D. fertilizer