1.having been shown around the lab,the visitors were taken to the playground.

1.having been shown around the lab,the visitors were taken to the playground.
A:having shown B:having been shown
C:being shown D:to be shown
2.i was overjoyed at the news of my country ______ so much progress.
A:to make B:to have made
C:made D:having made
3.last month a plane loaded with 30 journalists and ____ to make a safe landing crashed in Iraq.
A:tried B:trying C:to try D:was trying
4.the west-east gas pipeline project,____ in july 2002,______ china's longest gas pipeline,will be ready for a trial run soon.
A:beginning;making
B:begun;to make
C:to begin;make
D:beginning;made