Cách làm cho bạn:
1. Have you ever asked
2. Have you ever used
3. Have you ever compared
4. Have you ever waited
5. Have you ever seen
8. Read the Recycle! box. Look at the questionnaire below and complete the questions with the present perfect form of the verbs in brackets and ever. Then do the questionnaire in pairs.
1. Have you ever asked
2. Have you ever used
3. Have you ever compared
4. Have you ever waited
5. Have you ever seen
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