In ex1813 the English could work in the right context. In ex1821 it's fine; pulling up to the car means that he rode his bike up next to the car. ex1752 should be fine, the translation is just a little loose as far as I can tell.
Add Entry to Your Study List Choose the priority of studying you want to assign to this item from the drop-down select list
and then hit the save button. This will be used for sorting your personal study list.
If you wish to delete an entry that's already in your list, just set the difficulty to '0'