21．Have you read ．book on the table? I don’t think it is good one
A．a；a B．a；the C．the；the D．the; a
22．The large grassland, reaching out far away, looks extremely beautiful______ the blue and clean sky．
A．With B．against C. through D．beyond
23．Sharon gave me her address last week but I’m afraid I ．it
A．am losing B．have lost C．had lost D．would lose
