1. I'm Peter Brown __________ Apartment 10.
a. at
b. of
c. before


2. The heating system __________ our apartment hasn't been working.
a. with
b. from
c. in


3. I am very sorry __________ this.
a. to
b. about
c. by


4. I really regret that. But our engineers are too busy __________ present.
a. at
b. with
c. after


5. You'll have to pay us __________ the inconvenience according to the contract.
a. for
b. about
c. as


6. We will go to check it __________ tomorrow.
a. in
b. about
c. out


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