If it is a sunny day tomorrow, let’s ______it and go swimming in the South Lake.

One thousand dollars a month is not a fortune but willhelp cover my living ___________

Jack Smith has won first prize of the l00-meter race __________ at the school sports meeting.

He usually goes to school ______bike， but sometimes he goes to school ______foot.

______ you got to know I traveled to the USA?——Through one of your colleagues.