19. Russia is a country which extends across _____ .
| A．Asia | B．Europe | C．Asia and Europe | D．Africa |
---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 |
____ that caused him to serve dinner an hour later than usual.
| A．It was we being late | B．It was our being late |
| C．It was we were too late | D．It was because we were late |