________with so much trouble，we failed to complete the task on time.
| A．Faced | B．Face |
| C．Facing | D．To face |
To qualify yourself for this kind of new job, I recommend that you ________ some online courses.
| A．to take | B．taking | C．take | D．would take |
________ I can see, there is only one way to solve this problem.
| A．As far as | B．Even if | C．As long as | D．As soon as |
. It is the first time that I _____ abroad.
A. have been B. was B. will have been D. am
— Let’s go to a movie after work, OK?
— ___________. I am free tonight.
| A．Not at all. | B．What of it? | C．Never mind. | D．Why not? |
It was not until he arrived at the office_____ realized he had forgotten the key. 
| A．and he | B．when he | C．that he | D．he |