People in the westem countries like to _____ tricks_____ others on April 1st. [ ]

________ I know, light travels not only in a straight line.

The two top students in Mr. Green’s class competed _____ each other for the highest marks.

Someone has tidied the sitting room!—Jim __ it this morning; he couldn’t bear the mess any more

I know you have eaten all sorts of junk food your mother and I probably _____ you have.