Scientists have found out how pigeons find their way home but they keep it as asecret.
举一反三
- ______scientists have found a way to significantly slow down the ______ by______their______.
- Pigeons have been used as messengers because ______. A: they have a built-in compass B: they can cover 500 miles in a single day C: they have special ability to tell directions D: they can find their way home
- The police ______ the evidence last time, but they did not. A: must have found out B: should have found out C: must find out D: could find out
- It was not until dawn ______ their way out of the forest. A: when they found B: that they found C: did they find D: that they didn't find
- These scientists are interested in (find) ______ out how short-term memory becomes long-term memory.