A. catch sight of B. curtain C. conversation D. seriously A. one another B. Internet C. crowded D. governor A. what about B. invariably C. act D. sales department A. require B. drop by C. specialize D. worst A. differ B. winner C. camera D. find out A. example B. memory C. bookworm D. air tank A. grace B. report C. choose D. route A. so far B. international C. helmet D. bearing A. scramble B. creative C. lots of D. legibly A. up to B. prolonged C. everybody D. worry about