A. vain B. hen C. unshakable D. office A. salty B. bamboo C. eagle D. there is A. proper B. whale C. arrive D. float A. knock on the door B. aboard C. wet D. saleswoman A. nature B. humanity C. catch D. tape A. frog B. rainstorm C. stagger D. genetics A. radio frequency B. bonus C. feature D. cherub A. be interested in B. water bottle C. sea D. have lessons A. protest B. mirth C. Chinese paper-cutting D. forest A. cactus B. Atlantic C. quarter D. in danger