1个回答
展开全部
an-a (useful)
activity-activities
(take part后）添加in
happily-happy
hang-hanging
excited-exciting
(had better后）去掉to
had (learned)-have
of (us)-for
that (can help)-which
activity-activities
(take part后）添加in
happily-happy
hang-hanging
excited-exciting
(had better后）去掉to
had (learned)-have
of (us)-for
that (can help)-which
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