Can you tell the difference between "safety audit system" and "safe audit system" 1. This is a "safe audit" program to improve the safety of the system 2. This is a "safety audit" program to improve the safety of the system

A large size of samples ..... A large size of samples "are" necessary to this research. A large size of samples "is" necessary to this research. Which one is correct in grammar? Thanks.

What do you think of this ranking of English proficiency in terms of nationality

The world's largest ranking of countries by English skills

https://www.ef.edu/epi/

Do you think this is a clear instruction? "That's because students can book classes until 24 hours before class starts." In the system, students cannot book a class within 24 hours before the class starts, in this case, do you think the instruction is precisely expressed?

Is Personal Shopper Popular in Your Country?

Do you think personal shopper is new business model to develop?
Is it popular in your country? why? What is the niche of business model?
What is the next to develop in terms of personal shopper emergence?

Otherwise what it reminds you of ? 

https://theconversation.com/chinese-personal-shoppers-have-created-a-new-type-of-retail-store-in-australia-86844

Freeing up the huge areas set aside for parking can transform our cities

Parking may seem like a “pedestrian” topic (pun intended). However, parking is of increasing importance in metropolitan areas worldwide. On average, motor vehicles are parked 95% of the time. Yet most transport analysis focuses on vehicles when they are moving.

My questions:

# Is your city easy to park a car? Is the parking fee extraordinarily too high to afford for most citizens?

# In comparison with private cars to commute, Do you think the city council has to take more practical measures to suppress the swarming of the vehicles in particularly in the rush hours?  

# Do you think more space ought to be open to car running or you consider pedestrians have the highest priority to walk on the street freely and elegantly?

Thanks for your answer, in advance. 

https://theconversation.com/freeing-up-the-huge-areas-set-aside-for-parking-can-transform-our-cities-85331

Do you think the real estate hype is the culprit to impede the development of economy in a country? why

What do you think of the hype of real estate in your country?
Did you do something to avoid further depreciation of your property as a whole in the past years? such as investment in stocks
Who did real estate hype in your country? do you agree on their behaviors?
Does your government take some measures to avoid skyrocket of real estate prices?
What has the government done to the trending?

What kind of relaxation do you prefer to adopt to make you less terrible? Describe a way of relaxing that you consider particularly effective and explain why relaxation is thought to be so important in today’s world.