1.All of customer can come. I asked them to my party.
- All of customer who/that I asked to my party can come.
2.The train stop at every station. It leaves at8.00
-the train which/that  stops every station leaves at 8.00
3.The manager had extensive experience of industry. We selected him.
- The manager who/that we selected had extensive experience of industry.
4.The boy was away on holiday. I wanted to see him.
- The boy who/that I wanted to see was away on holiday.

Combine the two sentences, using the second sentence as an adjective clause.

1. The person is sitting at that desk. You should talk to her about your problem.
-The person whom you should talk to about your problem is sitting at that desk.

2. I want to tell you about the party. I went to it last night
ข้อนี้เรียงไม่เป็นค่ะ ไม่รู้จะเอาอันไหนขึ้นก่อน

Using non-defining relative clauses and suitable relative pronoun.

1. Richard runs the airline Virgin Atlantic.
He has now sold his record company to Sony.
-Richard, who runs the airline Virgin Atlantic, has now sold his record company to Sony.
-Richard, who has now sold his record company to Sony, runs the airline Virgin Atlantic.
(สองอย่างนี้อันไหนถูกคะ หรือได้ทั้งสองแบบ)

2.I am writing with reference to Mr.warburg. I have discussed your proposal with him.
ช้อนี้เรียงไม่เป็นอีกเช่นกันค่ะ พอขึ้นI แล้วไปไม่ถูก TT