Try it out! 1 選択肢の中から適切な語句を選び,英文を完成させましょう。 1. He was late again. He 2. I can't find my smartphone. I 3. You 4. A smartphone 5. To avoid unnecessary trouble, we checked the updated schedule online. left it on the train. tell anyone about the passwords for your social media accounts. be a good learning tool if we use it properly. be careful with our posts. could / had better / might have / must not/ should have