Question

combine the sentence . The road builders were blocked by rivers and canyons. 

The road builders built strong rope bridges​

Answer 1

Answer:

As the road builders were blocked by rivers and canyons, they built strong rope bridges.

Answer 2

As the road builder were blocked by rivers and canyons so the road builders built strong rope bridges.

Explanation:

You have four options for combining two complete sentences:

comma and a conjunction ("and," "but," "or," "for," or "yet")

semicolon and a transitional adverb, like "therefore," "moreover," or "thus"

semicolon (;)

colon (:)