sew。 threw。 drew。 blew。
what。 water。 watch。 want。
I always regretted not_________ harder when l was young． studyin9 。 having studied。 to study 。 D to have studied。
The room ________often cleaned by the students． will be 。 has 。 is。 was。
What the monitor said at the class meeting ________ quite all right． heard 。 listening。 sounded。 pronounced。
Have you ever been to the museum_________ was built last year?
