—The problem is very difficult. I'm afraid you can't work it out now.
— I fail this time, I will try it again.
A. Even if B. Since C. As if D. Though
Richard looked at the envelope and Jenny's handwriting immediately.
A. recognized B. found C. realized D. concerned
There's a big difference between saying you'll do something and doing it.
A. actually B. frequently C. gradually D. certainly
It was their old car my friend and his father sold to a Mexican last week.
A. when B. which C. whether D. that
While in Scotland, he made friends with the natives there.
A. working B. worked C. he works D. he is working
—Frank, what do you usually do at the weather station?
—I temperatures at 8 and 12 o'clock every day in the notebook.
A. put up B. put on C. set up D. set down
