用动词的适当形式填空。
1.  All the teachers discussed the plan that they would look to see_____( carry) out in the next
     school year.
2.The stranger said something in a _____voice and the little girl was ______.( frighten)
3. The young man _____(involve)in studying paid no attention to the outside world.
4.  _____(warn) of danger in the street at night,she had to go home,with a friend ____(follow) her.
5.  When I got there, I found the bookshop _____(pull) down.  The shop owner was nowhere to be found.