1. dice
2. tienen
3. vienes
4. salí (i hope this one is right)
They do that because it may not be said normally, it may have an accent attached along with it.
1- sabe
2-conoce
3-conozco
4-conoce
5-sabe
6-se
7-saben
8-sabes
9-conoce
10-sabe
11-sabe
12-sabe
13-conozco
14-conoce, sabe
15-saben
16-se
17-conoce
18-sabe
19-conoce
Hope this helps
The phrase means when I take a trip, I take a large suitcase.
The correct word to fill the blank and complete the sentence is letter B, vuelven.
• Ellas vuelven a la casa muy tarde.