1 She objects to____loud music____while she reads newspapers.

1 She objects to____loud music____while she reads newspapers.
A.have/play
B.have/played
C.having/playing
D.have/playing
2 You ought to have put the milk in the refrigerator,now____sour.
A.I smell
B.it is smelt
C.it smells
D.it is smelling
3 After the race____,the celebration began.
A.had been won
B.is won
C.will be won
D.has been won
4 He was here for a little while,but I don't knows where she____now.
A.is
B.was
C.had been
D.has been
5 The young teacher has____competent.
A.been proved to be
B.proved to be
C.been proved
D.proved being
6 Pluto,the outermost planet of the solar system,____photographically in March 1930.
A.discovered
B.was disecovered
C.by discovery
D.when discovered