___he met with the difficulty did he realize the importance of our help.
| A．Even though | B．Only before | C．Never until | D．Ever since |
______ in the queue for half an hour, the old man suddenly realized he had left the check in the car.
| A．Waiting | B．To wait |
| C．Having waited | D．To have waited |
Hot ______ the night air was, we slept soundly after the long tiring journey.
| A．although | B．as | C．while | D．however |
John has really got the job because he showed me the official letter ______ him it.
| A．offered | B．offering | C．to offer | D．to be offered |
—May I help you?
— Yes, I’d like to try on some sports jackets just like ______ I’m wearing.
| A．it | B．one | C．the one | D．which |
With all the money ______, the man had to make a living by begging.
| A．run out | B．to run out | C．used up | D．to use up |