题目内容：

单句语法填空

1.Due to the hard training they ______ (do) before, their performance were very impressive.

2.The study found that 81 percent of the participants finished their fastest work when music ____ (play).

3.Sometimes young people can have good and_____ (reason) ideas.

4.The state of Hawaii has already begun the ____ (recover) of the island by removing the animals living on grass and planting trees.

5.An expert, together with some assistants, ______ (sent) to help in this work.

6.Televisions is quickly taking the place of _____ (print) materials as the major source of news for most people.

7.Serious head and neck injuries happen most often in athletes _____play contact sports like football.

8.It is always a good idea _____roommates should be clear about their daily habits to avoid misunderstanding.

9.The floor is covered with ____seemed to be worms.

10.I was _____ (complete) at a loss at that time.