从方框中选择合适的短语并用其适当形式填空
clean up, make a difference, play a part in, be harmful to, hear
of
(1)
Her encouragement to
little Tom since then.
(2)
All the students in our class have
the park.
(3)
Would you like to
planting more trees in our schoolyard?
(4)
It gave me much pleasure to
your success.
(5)
The airbags (安全气囊)
in a car could children under 13 years old.
答案: 【1】has made a difference
【1】cleaned up
【1】play a part in
【1】hear of
【1】be harmful to