55. There have been many changes in _____ history of _____ English language.
| A．a; the | B．the ; / | C．/; the | D．the; the |
His mother looked very tired，for she _____ the house herself all day.
| A．had cleaned | B．has been cleaning | C．had been cleaning | D．has cleaned |
Having worked for as long as ten hours, the young man lay on the ground, _____.
| A．tiredly and hungrily | B．tired and hunger |
| C．tired and hungry | D．tiring and hungry |
My decision _____ to be a good one .
| A．to be proved | B．prove | C．proved | D．is proving |
You may keep the book for one more week_____ no one else needs it.
| A．provided that | B．so that | C．in order that | D．in case |
Unfortunately, their car _____ in the mud after the heavy rain.
| A．got stuck | B．got promoted | C．got lost | D．got involved |