Answers
1(c) say ‘speaking’ for ‘to speak’,
2(a) say ‘laid’ for ‘lay’,
3(c) use ‘on’ in place of ‘to’,
4(b) to revise, 5(e) no error,
6(a) say ‘comes’ for ‘will come’,
7(b) drop ‘he’,
8(a) Add ‘understand’ after ‘did not’,
9(c) use ‘has’,
10(c) say ‘but because’,
11(e) no error,
12(c) say ‘are seen’,
13(d) say ‘were not’,