Prepositions C

There are two (or three) prepositions missing in each sentence. Read the sentence carefully, try and understand it. Which prepositions make sense and can be used in this context? Then check the correct answers.

1) The trade unions have been dispute with the company owners the planned large-scale redundancies.

2) the best of my knowledge, this matter falls the jurisdiction of the Regional Court.

3) It is not beneficial for the company if it is involved endless litigation its contractors.

4) You may file additional comments and explanations any stage the proceedings.