It wasn't necessary for us to take a taxi. HAVE → We ................................................................................................. take a taxi. 6. You can't smoke in the non-smoking area. ALLOWED → You ..................................................................................... in the nonsmoking area. 7. You really should wear a warmer coat. BETTER → You .......................................................................................... a warmer coat. 8. It's very important to remember to tip the waiter → You ................................................................................. to tip the waiter. NOT 9. You are under no obligation to accept his offer. HAVE → You ....................................................................................................... his offer. 10. It was a mistake going to that restaurant last night. SHOULD → We ............................................................................... to that restaurant last night. Giúp mình với ạ