—Can you lend me the book Gone with the Wind? —Sorry. I returned it to the library just now. Maybe it is still ______.
A good speaker is supposed to manage to ________ the listeners what he means.
This group of designers ________a plan for the project of the company.
The police suspected him of carrying drugs so they________his bag,but found nothing.
.Walking alone in the dark,the boy whistled to ________ his courage.
To make sure those relics are well preserved,the museum has ________ modern technologies to monitor the conditions of them.