Please find the appropriate words or expressions which have the similar meanings to the following ones from Part 1 (para. 1) 1. in response to the invitation of sb. = _________________________ 2. adj. involving or causing sudden great damage or suffering = _________________________ 3. a mixture of good things and bad things = __________________________ 4. n. bad luck, often of a serious kind = ___________________________ 5. n. situation at a particular time = _________________________ 6. adv. extremely; very or very much = __________________________ 7. adj. Immense; incalculable =___________________________ 8. n. threat or danger = __________________________ 9. To flap or strike repeatedly = ___________________________ 10. n. a relatively calm interval; an interval of lessened activity = ______________________ 11. happen unexpectedly = ______________________