17、In vain to get in touch with the Embassy.
A: they tried
B: tried they
C: did they try
D: they have tried
A: they tried
B: tried they
C: did they try
D: they have tried
举一反三
- 17、In vain to get in touch with the Embassy. A: A、they tried B: B、tried they C: C、did they try D: D、they have tried
- In vain_______to get in touch with the Embassy. A: did they try B: tried they C: they tried D: they have tried
- In vain______ to get in touch with the authorities. A: they tried B: did they try C: they have tried D: the had tried
- In vain ______to open the locked door. A: he tried to B: did he try C: tried he D: he did try
- In vain ______ to convince him. A: I tried B: tried I C: did I try D: was I trying