A preview of what each question will look like appears to the right of the survey creator. You can also view all of your questions as they would look live by clicking 
You may also want to consider adding another owner to your survey so that they can take a peek. This can be done in step 3 of the survey-creation process before you purchase. A second pair of eyes can help you ensure that your questions are being interpreted correctly and there aren't any unintended errors.