下列各句中，表达得体的一句是

We have an English speech contest ________August 5th every year.

_______ into English, the sentence was found to have an entirely different word order[ ]

51 They planned to go to Beijing for sightseeing, but because of their daughter’s unexpected illness they had to stay at home _____

I admire my English teacher I can remember very few occasions ________ she stopped working because of ill health