A. government B. upside C. foot D. stair A. deliver B. thank you C. disposal D. butterfly A. handkerchief B. sleepy C. conclude D. yum A. colleague B. goodbye C. nobody D. DNA A. let out B. stairs C. force D. idiomatic A. triangle B. keep clear of C. match D. the Terracotta Army A. alien B. porter C. experiment D. palace A. vacuum B. hybird rice C. solar D. boom A. machine B. female C. kebab D. suspend A. circular B. navigation C. grandchild D. stretch