1. He told us that two hours wouldn't be enough to finish the job.

2. Unless she makes the mistake again, the man won't get angry at her. 

3. The last time we visited my grandparents was two months ago.

4. No one in the club plays tennis as well as Janet.

5. The shelf was too high for the children to reach.

1."Two hours won't be enough to finish the job" he said to us.

--->He told us two hours wouldn't be be enough to finish the job

2.If she doesn't make the mistake again,the man won't get angry at her

---->Unless she makes the mistake again,the man won't get angry at her ( unless = if not )

3.We havent visited my grandparents for two months

----> The last time we visited my grandparents was two months ago.

4.Janet is the best tennis player in the club

---->  No one in the club plays tennis better than Jane.

5.The shelf was so high that the children couldn't reach it

---->The shelf was too high for the children to reach.