But for her help, they ___ over the mountain in such a short time.
A: couldn't have run
B: had not run
C: have not run
D: could have run
A: couldn't have run
B: had not run
C: have not run
D: could have run
举一反三
- The pen won’t write, it ______ out of ink. A: should have run B: could have run C: can have run D: must have run
- When I was on the track team, I used to ______ the 400-meter. A: running B: have run C: have to run D: run
- When you a friend that you haven't seen for a long time and have a good chat with him, you may feel very happy and delighted. A: run out B: run into C: run away D: run down
- The contract will______at the end of the year. A new one will have to be drawn. A: run out B: run into C: run on D: run after
- Henry's car stopped on the highway. It ( ) out of gas. A: may not run B: may have run C: must run D: ought to run