I stayed up all night ______ to find a new solution to the problem
A: trying
B: have tried
C: try
D: tried
A: trying
B: have tried
C: try
D: tried
举一反三
- I stayed up all night（）to find a new solution to the problem. A: had tried B: try C: trying D: tried
- I stayed up all night,____________ to find a new solution to the problem.
- I stayed up all night trying to find a new _____ to he problem.
- He<br/>__________ to stay up all night, but he fell asleep. () A: automated B: tried C: service D: trying
- In vain ______ to convince him. A: I tried B: tried I C: did I try D: was I trying