Hey guys! I've got an exercise where you've to find out the correct sentence in each pair.
1) a-We were tired and thirsty, so we stopped to have a drink at the cafè.
b-We were tired and thirsty, so we stopped having a drink at the cafè.

2)a-If your computer freezes, try to turn it on and off again and see if that helps.
b-If you computer freezes try turning it on and off again and see if that helps.

Please help me! It's urgent!