Thank you, Diamond! "Topnotch" is a good word.
I myself use was/were with "as if" as follows:
1. He looked as if he was about to cry.
— describing the appearance of someone in the past.
2. He looks as if he were about to cry.
— describing the appearance of someone now; subjunctive "were", so I don't really think he's about to cry. I might be describing a miserable-looking colleague, for instance. Cf.
3. He looks as if he's about to cry.
— again, describing the appearance of someone now; but this time, I do think he's about to cry. I might be describing a baby, for instance.
Additionally, some people use the subjunctive for unreal events in the past:
4. He looked as if he were about to cry.
I think this is more common in American English; as a BrE-speaker, I'm not very comfortable with it. (So I wouldn't score very high marks in the test you mentioned.)
See you,
MrP