用下列单词的适当形式填空,每词只能用一次

用下列单词的适当形式填空,每词只能用一次
attention receive untill ring
1、Now human right is getting more _____ than it was in recent years.
2、It was not ______ late afternoon that they began to do homework.
3、He awoke to the _______of an electri bell.
4、He had _______a heavy blow on the head from a falling rock.

1.attention
2.until
3.ring
4.received
untill应该是until