---There are a lot of _________ of bike riding.---I agree. It’s good for the environment and it saves money.
–What did the policeman say to you just now? --He asked ______ when the accident happened.
-- What did your sister say _____ you? -- She reminded me _____ her birthday.
I’m usually free _____ Tuesday _____ Thursday.
There are _____ places of interest we could visit in Beijing.
-- Did you go to see the doctor yesterday? -- Yes, the doctor advised me ________ too much junk food.