complete the sentences. use can or can't and the verbs in brackets.

1) ruby ............... (swim). she's afraid of water.
2) my parents .................... (ride) a bike. they go cycling in the mountains.
3) mark and karen .................... (surf). they take their boards to the beach every weekend.
4) i ..................... (skateboard). i tried it once, but i fell off all the time. i didn't enjoy it.
5) lily .................. (run) very fast. she won a competition last month.