people who（will） attend the party will have exams

[Matthew Wai]

The first to arrive at the meeting room will set these computers.

The last question, I promise...

I don't think you had to make such a promise.

 

[emsr2d2]

The man who arrives at meeting office first is going to set these computers.

The person who arrives at the meeting room first will have to switch on the computers.
The person who arrives at the meeting room first is responsible for switching on the computers.

(I think that's what you mean.)

 

[MOYEEA LEE]

The person who arrives at the meeting room first will have to switch on the computers.
The person who arrives at the meeting room first is responsible for switching on the computers.

(I think that's what you mean.)

Thanks so much!

But in the first sentence,

can I change "will" to "be going to"?

The person who arrives at the meeting first is going to switch on the computers (according to the rules).

Thanks so much!

 

[Matthew Wai]

It sounds to me as if 'The person who arrives at the meeting first is now going to ...'.

 

[emsr2d2]

Adding "now" makes it sound as if it were previously (and recently) someone else's responsibility but that situation has changed.