A. click B. lecturer C. distinction D. case A. outbreak B. keeper C. behavior D. rider A. theme park B. annoyed C. upward D. altitude A. poster B. bargain hunter C. memory-chip D. helmet A. height B. premise C. aid D. hiking A. crossing B. storm C. jar D. reflector A. sighting B. touch C. empty D. sales assistant A. bye B. do some cleaning C. pay attention to D. my pleasure A. oddly B. flight C. Spring Festival D. truck A. stage B. feature C. archaeological D. torpedo