The door _______ open, no matter how hard she pushed.
| A．shouldn‘t | B．couldn't | C．wouldn't | D．mightn't |
After some time in the dark cave, our eyes slowly _____ the dark.
| A．used to | B．adapted to | C．accustomed to | D．helped to |
---Did the little boy manage _____ the suitcase upstairs?
---No, he didn’t. He isn’t strong enough even ______ it.
| A．to carry, moving | B．carrying, to move | C．to carry, to move | D．carrying, moving |
______ the workers’ working conditions, the boss will allow them to have a coffee break.
| A．Improving | B．To improve | C．Having improved | D．Improved |
My friend David was not used _______ by air, so he felt unwell(不舒服).
| A．to traveling | B．to travel | C．traveling | D．Travel |
We stopped on our way to London for _____.
| A．an or two hours | B．an and two hours | C．one hour or two | D．one or two hours |