Only when I made it to the train station _______ that I had left my ticket at home.
| A．have I realized | B．did I realize | C．had I realized | D．would I realize |
Mrs. Brown was much disappointed to see the washing machine she had had _______ went wrong again.
| A．it | B．it repaired |
| C．repaired | D．to be repaired |
The teacher together with the students _______ discussing Reading Skills that _______ newly published in America.
| A．are; were | B．is; were | C．are; was | D．is; was |
Nowadays children have easy _______ access to computers, so most of them spend lots of time playing computer games after _______ class.
| A．an; the | B．/; the | C．an; / | D．/; / |
— Have you ever read The Brief History of Time?
— Yes. While in Britain, I ______ it a couple of times.
| A．have read | B．read | C．had read | D．would read |
______ they are most interested in is ______ they can produce more and better
cars.
| A．That;how | B．What;how | C．What;what | D．That;that |