_____ is mentioned above, the number of the students in senior school is increasing.
| A．Which | B．As | C．That | D．It |
Facing the poor grades, Maria is wondering what it ___ to learn English well.
| A．takes | B．uses | C．makes | D．prepares |
_____ you didn’t know the rules won’t be an excuse for your failure to report.
| A．That | B．What | C．Because | D．How |
— Did a letter come for me this morning?
— Yes. _____ came for you.
| A．That | B．It | C．One | D．The letter |
— I really don’t know how to thank you enough.
— ________________.
| A．No problem | B．Think nothing of it | C．Not at all | D．It doesn’t matter |
The little girl sat at the door with her legs ___ and kept her eyes ___at the planes flying in the sky.
| A．crossed; looking | B．crossing; looking | C．crossed; looked | D．crossing; looked |