Question

I can't accept Tom's proposal unless he shows me the contract

Answer 1

Explanation:

In given sentence, there is one dependent clause and other is dependent clause.

A clause is a group of words containing a subject and a verb. Simple sentences have one clause; compound sentences have two or more independent clauses; and complex sentences have two or more than two independent and dependent clauses.  

Here the first cluase is about accepting Tom proposal but it's dependent on the second clause of viewing contract

Answer 2

Answer:

unless his shoewme the contract