I was just about ___ road ___ a ship came to us.
| A．traveling on; while | B．to travel on; while |
| C．traveling by; when | D．to travel by; when |
She ____ necklaces with the help of Ms Sullivan when she ____ that she had made some mistakes.
| A．was working, was noticing | B．made, was noticing |
| C．made, noticed | D．was making, noticed |
____ Helen’s knowledge and vocabulary expanded, she asked more and more questions.
| A．When | B．While | C．As | D．Before |
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 |