根据句子意思，用括号中所给单词的适当形式填空，并将答案填写在答题卡标号为46—50的相应位置上。
All of us were satisfied with this        (sing) songs at the concert.
It was        (possible) for anyone to get in because the door was locked.
My classmates helped a little girl find her parents on a        (rain) day.
World No. 1 Ma Long from China won his        (one) men’s singles world table tennis championship.
I would rather stay at home than        (play) football with my classmates because it is too hot outside.