21. Buses here are always crowded with passengers, so I prefer there rather than a bus.
A. cycling; take B. cycling; taking
C. to cycle; take D. to cycle; taking
22. You can us in the discussion if you want to.
A. join B. join in C. attend D. take part in
23. We don’t need to do extra work this evening. Today’s work is almost now.
A. at an end B. in the end C by the end D. at the end
