In vain ______ to convince him.
A: I tried
B: tried I
C: did I try
D: was I trying
A: I tried
B: tried I
C: did I try
D: was I trying
举一反三
- I think his method is worth ________. A: to try B: to be tried C: being tried D: trying
- I vain _____to open the locked door. A: he tried B: did he try C: he tries D: does he try
- I only called the police when I ______ everything else. A: tried B: was trying C: had tried D: had been trying
- I tried hard to convince her to stay.( ), I gave up.
- I stayed up all night（）to find a new solution to the problem. A: had tried B: try C: trying D: tried