A.the doorbell rang | B.the doorbell rings |
C.we heard the doorbell ring | D.we heard the doorbell rings |
A.who has made | B.having made | C.made | D.making |
A.to introduce | B.introduced |
C.introducing | D.to be introduced |
A.plays | B.played | C.playing | D.to play |
A.To see | B.See | C.Seeing | D.Seen |
A.he bought a Walkman |
B.his father bought him a Walkman |
C.a Walkman was bought by him |
D.a Walkman was offered to him |
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