English help on a web questionnaire

Dear People (especially those in the US),
I am a PhD student in economics and I am going to hold a web questionnaire that will take place in the US.
The numebr of respondents will be about 1500.
I have prepared the web questionnaire myself.
During the preparation I checked books on questionnaire design and other questionnaires that were similar in nature.
I did checks and I discussed it with my supervisor.

But I am not that all confident if I could design the questionnaire well. In particular, I do not know if the questions are clearly understandable. I am not a native English speaker after all
Therefore, I need some people to express their opinon on the questionnaire. Escpecially I want to know if the questionniare is understandable to you at the first glance.
If not, what is not clear etc...
Would there be anybody willing to have a look at the questions and express their opinion?
I will not necesserily askyour view for all the questions. Checking only one question will already be a great help to build up my confidence.
Especially of those of you who are good in English, I would like to ask your gudience.
If you would be willing to have a look at one or two questions, please let me know and I can send the question to your email adress. I will send a file in word format or in pdf, however you wish (you should not worry about virus or anything in the files. I am an academic and I am not into such fuss that will give yo a headache, trust me on this).

I would very much appreciate your concern.
After all, this is a scientific study and it is for the American Society. Your help would be helping the research, not to my personal interest.

Hoping to hear from you.