5.9 homework

1. The design stage typically lasts _about_two months. 
>> for
2. We\'ll let you know about our decision _until_ tomorrow.
>> by
3. I like working _with_ Bill. He\'s really laid-back.
>> Correct
4. The design process _in_ this product is fairly complicated.
>> for
5. Please inform me _on_ your decision. 
>> of
6. This is an issue that came up _with_ the early stages of the project. 
>> during
7. The demand for our product has risen by 50% _among_ the last two years. 
>> over
8. John will be in charge _of_ all the technical aspects. 
>> Correct
9. Are you working _on_ the project that I assigned you to?
>> Correct
10. I work _at_ downtown Chicago/ I work _in_ the center ( = central part) of the city.

>>  Correct