Question

I also need help with my English synthesis and transformation,

1) I was absent from school yesterday, so I did not meet the new principal.
If I had_________________________________.

2) You must not tell the secret. Many want to know the secret.
No matter_________________________________.

3) All the teachers were surprised when Joan Chang arrived early for school.
________________________________surprised all the teachers.

4) The 16- years old adventurer attempted to sail round the world, but she did not succeed.
____________________________________ was not successful.

Answer 1

Try this for #1:

If I had not ...

Let me know how you'd write that sentence, making sure it means the same thing as the original.