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1. Much attention should be paid _______ the wild animals as many of them are dying out.
A. to protecting B. to protect C. protecting D. protect
2. Hearing his travelling _______, I knew that he was an _____ traveller.
A. experiences; experienced B. experience: experience
C. experiences ; experiencing D. experience; experiencing
3. ____ his arrival ____the airport, he received a warm welcome from the teachers and students.
1. Much attention should be paid _______ the wild animals as many of them are dying out.
A. to protecting B. to protect C. protecting D. protect
2. Hearing his travelling _______, I knew that he was an _____ traveller.
A. experiences; experienced B. experience: experience
C. experiences ; experiencing D. experience; experiencing
3. ____ his arrival ____the airport, he received a warm welcome from the teachers and students.

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