A. mountain B. robber C. be worried about D. guest A. confidence B. in English C. eat out D. shorts A. host B. passport C. parden D. cooperate A. protein B. tough C. trusting D. last A. sunglasses B. cast down C. hold back D. star sign A. local B. homestay C. minstrel D. shining A. communication B. agonizing C. lead to D. weigh A. across the road B. culture C. pass by D. add up A. tool B. rapidly C. depend D. be in trouble A. bitter B. at the end of C. uniform D. on one's own