To "stick to something" means that you continue to do it and don’t ______.
| A．give in | B．put off | C．give up | D．put up |
I didn’t know I was spelling a word or even ____ words existed.
| A．that | B．what | C．which | D．one |
In a way, Pompeii is like a time capsule ____ a frozen moment in history.
| A．protecting | B．preserving | C．preventing | D．protesting |
By the time some scientists ____ the lost towns, they ____ an awesome historical site.
| A．had found, had found | B．found, found |
| C．found, had found | D．had found, found |
He constantly gets into awkward and absurd situations, ____ audience can be greatly amused.
| A．which | B．where | C．that | D．what |
When this happens, he smiles and nods, ____ that everything is fine.
| A．indicated | B．indicating | C．to indicate | D．indicate |