.--Many people are wondering __________ in the forest.
--It’s reported that a burning cigarette bar caused it.
A.when the fire happened | B.what caused the fire |
C.how did the fire happened | D.why did the fire happen |
.--Many people are wondering __________ in the forest.
--It’s reported that a burning cigarette bar caused it.
A.when the fire happened | B.what caused the fire |
C.how did the fire happened | D.why did the fire happen |