1. <span>present
2. </span><span>the past tense
3. </span><span>past participle
4. </span><span>present participle.
Hope I helped:P</span>
Answer: A. George Stephenson was joined by other inventors to enhance the design of locomotives.
Explanation: I got it right on Edmentum.
1. However
2. For example
3. As a result
4. Furthermore
5. Nevertheless
6. Whereas
(I hope this helped!)
A9 lines here and I'm pritty shure