题目

On a hot day, I decide to mow our extremely hilly lawn. It was likely to    21    a jungle（丛林）with weeds growing wildly. I need to mow it at once. After several false    22      , I had to examine it and finally got our old lawn mower     23      . I was mowing and trying hard to push the machine uphill, which was really a hard job, for the machine was too old to work well. I was so   24  that I complained under my breath, so I decided to take a short break. At the top of a rise, I   25  to see my 12-year-old John Thomas standing there, with a smile on his— Do you know _____?— Next Sunday.A．what they will doB．where they will doC．when they will come hereD．who they will meet