用动词的适当形式填空
1〉You may go fishing if you work ( )〈do〉
2〉Where is the bird?
It ＿(fly)away a moment ago.
3〉In the last several years we ＿(set)up many new buildings in our hometown,
4〉My brother likes＿(hum)songs.
5〉The hen ＿(lay)an egg yesterday.