testify

[Anonymous]

Hi,
Please check these sentences and correct them.
1. The incident [proved, testified to] his incompetency.
2. The pyramids testify to [the Egyptians, the Egyptians' ability].
3. I think he will testify against you.
4. The witness testified that the driver was speeding drunk.
5. The doorkeeper testified that he [saw, had seen] the man leaving the building in haste around the time of the murder.
Thanks in advance.

[Rusty]

1. The incident [proved, testified to] his incompetency. (OK).
2. The pyramids testify to [, the Egyptians' ability].
3. I think he will testify against you. (OK).
4. The witness testified that the driver was speeding drunk. (OK).
5. The doorkeeper testified that he [saw, had seen] the man leaving the building in haste around the time of the murder. (OK).