Mysister,aninexperiencedrider,wasfoundsittingonthebicycle____________tobalanceit.
A: havingtried
B: trying
C: totry
D: Tried
A: havingtried
B: trying
C: totry
D: Tried
举一反三
- I only called the police when I ______ everything else. A: tried B: was trying C: had tried D: had been trying
- I think his method is worth ________. A: to try B: to be tried C: being tried D: trying
- In vain ______ to convince him. A: I tried B: tried I C: did I try D: was I trying
- 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 A: trying B: have tried C: try D: tried