—Why do you look worried?
—There are so many problems______.
| A．remaining to settle | B．remained settling |
| C．remaining to be settled | D．remained to be settled |
Into the dark apartment ___,who was quite surprised when everyone shouted “Happy Birthday”.
| A．did David walk | B．David walked |
| C．David did walk | D．walked David |
--So you gave Lucy your iPad?
--_______ I just lent it to her.
| A．That's OK | B．Not exactly |
| C．It doesn't matter | D．No problem |
The companies are working together to create they hope will be the best means of transport in the 21st century.
| A．which | B．that | C．what | D．who |
I'm sorry to bother you, ____ can you direct me to the railway station?
| A．so | B．and | C．but | D．yet |
_______you need any help, please don't hesitate to let me know.
| A．In case | B．Now that |
| C．Even if | D．Ever since |