Lucy prepares to participate in the upcoming sports meeting next week.

lucy is going to participate in sports meeting that will be held next week。(Note: "Preparing to participate in the upcoming sports meeting next week" is something that has been determined and planned, so it is better to use be going to; In addition, because the sentence is too long, a that leading definite clause is used to modify "sports meeting", so this is a compound sentence with a definite clause. ）

lucy is going to take part in the next week's sports meeting.

There is no limit to verbosity.

lucy will take part in the upcoming sports meeting, which will be held next week.

Preparation means "intend, will" be going to will

The athletic meeting is held on Thursdays.

According to the question type, the school sports day, which was originally scheduled for Monday, had to be postponed for three days due to the weather forecast for three days of rain, which was due to safety reasons. Then three days later it will be Thursday.

To postpone is to move back the scheduled time. According to the conditions given in the question type, the sports meeting is scheduled to be held on Monday, but if there is rain, it means that it will not be held on Monday, but will be postponed for 3 days, so the sports meeting will be held on Thursday.

The answer is Thursday, if you want to postpone it by one day, it is Tuesday, then three days later is Thursday.

The school is preparing to hold a sports day on Monday, but it will rain on Monday, and the sports meeting will be postponed for three days.

Thursday is very easy to figure out, because if you postpone it for one day, it will be Tuesday, and there is no such thing as postponing it for 0 days.

Wednesday. The Games were postponed to the third day.