—How could you get such a good idea?
—What my father said made me excited, and then I ____ the idea.
A. put up with B.caught up with
C. kept up with D. came up with
Robots similar to real people were shown in America. I think there ___ fewer workers in factories in a few years.
A. were B.are C. will be D. have been
Mr. Li can’t attend the meeting on time _____ he takes the early flight to get there.
A. because B. whenever C. if D. unless
I ____ my pen on the table, so I can’t write down his telephone number.
A. leave B. forget C. have left D. has forgotten
—I went to your house last night, but no one was in.
—I ____ speaking English with my friends in the school at that time .
A. practiced B. was practicing
C. have practiced D. am practicing
Our classroom ___ every day. We can study comfortably in it.
A. cleans B. clean C. was cleaned D. is cleaned
