Check these, please!

[Anonymous]

Hi,
Please check these sentences and correct them.
1-1. I've [gained, put on] a few pounds this fall.
1-2. I've [gained, put on] a little weight this fall.
2. He did it [his way, in his way, his own way, in his own way].
3. Please aim the camera [his way, in his direction, toward him].
4. [Having sat, Sitting] on the bank (of the river), they were enjoying the sunset.
5. Last time I forgot to [fill in, write] my name on the paper, so I failed the exam.
6. Can you help wash my car? / I'm going out in a minute. Why don't you go to a car wash?
Thanks a million.
Ann

[Anonymous]

1-1. I've [gained, put on] a few pounds this fall. (OK).
1-2. I've [gained, put on] a little weight this fall. (OK).
2. He did it [his way, in his way, his own way, in his own way]. (OK).
3. Please aim the camera [his way, in his direction, toward him]. (OK).
4. [ Sitting] on the bank (of the river), they were enjoying the sunset.
5. Last time I forgot to [fill in, write] my name on the paper, so I failed the exam. (OK).
6. Can you help wash my car? / I'm going out in a minute. Why don't you go to a car wash? (OK).

[Pete]

-- I agree with "Guest's" answers. This one was not answered:

4. [, Sitting] on the bank (of the river), they were enjoying the sunset. [With "sitting", it sounds fine.]