Choose the correct answer

_________ my bag anywhere? I can't find it.
1. Did you see
2. Have you seen
Larry ________ his novel for the last two years.
1. is writing
2. has been writing
From the minute he got up this morning Gary ______ silly questions!
1. has asked
2. has been asking
Have you given Helen my message when you _______ her?
1. have seen
2. saw
The police think that they _______ your wallet, so call this number.
1. found
2. have found
Eric, this is Amanda
1. Did you two meet
2. Have you two met before?