—I do believe the scientific explanation that when a tomb is opened, the fresh air disturbs the viruses inside it. What about you? —So do I. If _______ in, the disturbed viruses may cause illness or even death. 

I'm afraid that I can't make myself ___ because of my poor English. 

The library needs ＿＿, but it will have to wait until Sunday．

The conference the_____ possibility of closer trade links.

_________ from the space, the Great Wall lies in the mountains like a huge dragon.