A. mailbox B. sleeping C. hotline D. side by side A. kowtow B. apologize C. each other D. pitfall A. X-ray B. ours C. Korea D. hungry A. bookcase B. excited C. mummy D. enter A. be caught in B. hers C. cube D. migrate A. renewable B. drinking C. board D. by boat A. inventor B. like C. rusty D. dreary A. brainstorm B. doughnut C. in surprise D. eating A. each B. moot C. cabin D. make a basket A. network B. snore C. same D. his