Present Or Past Participle - Test 1 | Exercise follow Topic

refer to the following notice.

The city’s Waste Management Division has been cleaning Brentridge’s streets twice a month. However, in response to the rapid accumulation of trash in several districts, we have decided to increase the frequency of this service to once a week starting May 1 (65) ___we hope to improve the appearance of public areas while removing substances that could contaminate the environment.
There are a few things that you need to be aware of. First, each neighborhood has been assigned a day of the week for its streets to be cleaned. (66) ___Additionally, residents must make sure to keep their curbs (67)------- at these times. This is vital as our cleaning vehicles will be unable to reach them otherwise. We would truly appreciate your (68) ___with these changes.