1 . When the passengers get off the bus, they are reminded not to leave any of their belongings   ________. (用适当的词填空)

2 . Having given _______ some national secrets to the enemy, the man was sentenced to prison. (用适当的词填空)

3 . The little girl walked there to pick ________the rubbish.(用适当的词填空)

4 . Mr. Smith had stayed in many parts of the world, and he finally settled ______in Canada in the 1990s. (用适当的词填空)

6 . We must try our best to seek _____ a solution to the problem. (用适当的词填空)

7 . First I cut the tomatoes into pieces and put them ________.(用适当的词填空)

8 . He is young enough to bounce________ from this disappointment. (恢复) （用适当的词填空）

9 . There are over 58,000 rocky objects in space, about 900 of which could fall onto_________ the earth. （用适当的词填空）

10 . When you are learning to ride a bicycle, you often fall ________. （用适当的词填空）