Sentence: b Pattern: ps
4
Sentence: a Pattern: ce
5
Sentence: f Pattern: cc
Missing sentences
1、a b f
Exercise 21
1
Sentence: d Pattern: s
2
Sentence: e Pattern: cc
3
Sentence: b Pattern: l
4
Sentence: a Pattern: ce
Sentence: b Pattern: ps
4
Sentence: a Pattern: ce
5
Sentence: f Pattern: cc
Missing sentences
1、a b f
Exercise 21
1
Sentence: d Pattern: s
2
Sentence: e Pattern: cc
3
Sentence: b Pattern: l
4
Sentence: a Pattern: ce