A. troublesome B. sit C. stick D. trust A. kindness B. come up C. animal D. concentration A. original B. mission C. where D. like A. mention B. mice C. masterpiece D. article A. concrete B. accord C. arrow D. giraffe A. hamster B. research C. Motherland D. Baltic A. frequent B. play sports C. aquaplane D. elephant A. camel B. virtually C. monkey D. over and over again A. pet B. physician C. unspoken D. difference A. lately B. dock C. brilliant D. fish