Подчеркните правильный вариант ответа. dog food smell so terrible/terribly. their front door was wide/widely open. throw it as high/highly as you can. they dug the hole deep/deeply. he will hard/hardly have time for that.

1) terrible.
2) widely.
3) highly.
4) deep.
5) hardly.
Окончание "ly" приставляется к наречиям, в обычном виде эти слова являются прилагательными.