【单选题】Some individuals would therefore not have been caught, since no baited hooks would have been available to trap them, leading to an underestimate of fish stocks in the past.
【简答题】用所给单词的适当形式填空。 1. Tiger Woods (start) golfing when he (be) 4 years old. 2. When was your father _ (born) ? 3. You are never too old _ (learn). 4. Lily (start) writing music when she was seven years old...