Only after a year ____ to see the results of my experiment.
A: I began
B: I had begun
C: have I begun
D: did I begin
A: I began
B: I had begun
C: have I begun
D: did I begin
举一反三
- Only after liberation to be treated as human beings. A: did they begin B: they had begun C: they did begin D: had they begun
- Only after I had reached the airport ________ that I had forgotten to take my ticket with me. A: I realized B: have I realized C: did I realize D: I had realized
- The film __________for half an hour when I got to the cinemA． A: began B: begun C: had begun D: had been on
- When I got to the school, the first class _____. A: had begun B: began C: is beginning D: has begun
- I think it is high time they ______ to take you more seriously. A: began B: should begin C: begin D: begun