Use Present Perfect or Present Perfect Continuous to complete the sentences. Use the full...

Question

Use Present Perfect or Present Perfect Continuous to complete the sentences. Use the full form of verbs. ​

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Answer 1

1. Have been preparing (we have the marker since)
2. Have all been waiting (we have the marker for)
3. Have prepared (we focus on the result)
4. Have known (the verb 'to know' isn't often used in the gerund form)