1. Use Upper Case for long vowels: terrIs. (Answers are case sensitive.)
2. In case you receive this message from your browser: "To help to protect your security...", click on the message an then select: "Allow blocked content". It's safe.
3. Disable Pop-Up Blocker.
4. You must complete the entire exercise (fill all the gaps), or else, wait until your time is over.
5. Use period at the end of each sentence.