1. The necklace ( might / couldn’t ) be a fortune. But then again, maybe it’s a fake. 2. That handwriting looks like my friend, so he ( can’t / must ) have written this homework. 3. My uncle, ( that / who ) is an English teacher, has been teaching me English since I was young. 4. No, I’m ( scared enough / too scared ). I won’t do it because those snakes are terrible. 5. This building must have been ( more difficult / most difficult ) to build than other normal ones in the area due to its complexity. 6. The Seikan Tunnel is the ( longer / longest ) undersea tunnel in the world. 7. Someone left their baskets on the table. They (must be / could be) worried about losing them. 8. The tuition fee ( might not / must not ) have cost a lot of money. 9. The concert hall is ( big enough / as big as ) to hold 20 people. 10. It’s ( too cold / as cold as ) outside. I need to put on a jacket.