the right form in the sentences from Chapter 4.
a) The tunnel began to grow and _(long). It
went and (deep).
b) And gradually the noise of the shovels became
and (loud).
c) The noise he heard was (frightening) noise a
fox can hear the sound of shovels digging into
the soil.
d) "It hurts," said Mr Fox. "I know, sweetheart.
But it'll soon get (good)."
e) "I think we've done it! They'll never get as
(deep) as this," said Mr Fox.