________you were coming，I would have stayed at home.
| A．If I know | B．Should I know | C．Had I known | D．If I should have known |
---What do you think of the film?
---Cool! Never before _____ a better one.
| A．had I seen | B．I have seen | C．have I seen | D．I had seen |
Despite the great difficulty we had _____ out the plan, it paid off in the end.
| A．carrying | B．carried | C．to carry | D．carry |
Faced with_____ challenges, you should believe that your courage is what makes_____ difference.
| A．the; / | B．the; a | C．/; a | D．/; / |
We shouldn’t take_____ for granted that our parents will take care of us forever.
| A．this | B．that | C．them | D．it |
—Oh no! We’re too late. The train ______.
—______. That’s OK. We’ll catch the next train to London.
| A．was leaving | B．had left | C．has left | D．has been leaving |