1.______receiving the beautiful gife,Gloria wrote a letter o

1.______receiving the beautiful gife,Gloria wrote a letter of thanks to Mr Cremer.
A.In B.On
C.By D.From
2.The perfomance of the host,_______to please the audience and draw their attention,was greeted with a cold silence,however.
A.had intended B.intended
C.intending D.to intend
3.Those who have______the army will get two- months strict training before they go to the front.
A.been in B.joined in
C.taken part in D.attended in
Please give the answers and explain why.Thanks a lot.