First of all I ask 2-3 students to read the text. then let them try to guess. as soon as the answer is found i work with them a second activity with the same riddle. I some of them to retell the answer in Past Simple. next student does the same but in Present Progressive,or Futurei or using MUST. It's up to you. Very often they grumble, but work it.
the key is:
he takes a goat
goes back
takes cabbage
leaves it and takes goat back
then takes wolf
goes back
takes the goat
enjoy)
the key is:
he takes a goat
goes back
takes cabbage
leaves it and takes goat back
then takes wolf
goes back
takes the goat
enjoy)