________at his model plane over the weekend，he didn’t complete it． As he worked hard 。 Hard as he worked。 How he worked hard。 How hard he worked。
I looked and looked，and at last I made out two figures moving slowly in the _______. end 。 distance 。 past 。 wild。
sew。 threw。 drew。 blew。
Have you ever been to the museum_________ was built last year? which 。 where。 when。 what。
key 。 they 。 obey 。 grey。
I always regretted not_________ harder when l was young．
