参考答案:
S1. Viewing à Viewed
S2. inaccurate à accurate
S3. (enjoys) à he (enjoys)
S4. up à back
S5. year à years
S6. (even) if à (even) /
S7. co-operate à co-operated
S8. when à after
S9. were à was
S10. farming à hunting
n. 生存,幸存者