A:T=21-3h
B:T=3h-21
C:T=21+3h
D:T=(21-3)h
Fire can____ down a lot of trees. It can____ people, too. We must be____with fire. We mustn't____ in the forest. We mustn't play____ fires at home. We mustn't play with matches either.
is good at on holiday get through grow crops play near fires