I have used two sentences in a informal letter in IELTS exam - at the beginning and at the end of the letter. But I'm doubtful about that two sentences(below) because they are without a subject.
- Hope everything is going well with you. [at the start]
- Looking forward to see you soon. [at the end]
I also have another doubt about the second sentence. Should it be:
Looking forward to see you, Or looking forward to seeing you
Can you please tell me if those two are acceptable in an informal letter?