1.（ ） twice a year ,whether it is a car or a bus ,is the rul

1.（ ） twice a year ,whether it is a car or a bus ,is the rule that every driver must obey in this city.
A Examining B Examined C Being examined
2.The girl ( )next to me has been considering going on a diet.
A sits B sitting
3.The flowers ( )sweet there look ( ),and many vistors are attracted to the beauty of ( )
A smeel ;lovely; a nature Bsmelling ;lovely ;nature
4.Humans are destroying nature day by day ,( )of coure,will cause punishment .who / which/ it/ of which
5.( )the bad news,rears rolled down her cheeks.
while hearing/when she heard /hearing/having heard