Every possible means ______. A: has tried B: has been tried C: was tried D: were tried

I ____ the window. A: tried open B: tried opening C: tried to open

__________, they couldn’t solve the mystery. A: As they tried hard B: Tried as they hard C: Hard as they tried D: No matter they tried hard

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

17、In vain to get in touch with the Embassy. A: they tried B: tried they C: did they try D: they have tried

He_______ to find a job but he had no luck. A: tried hard B: tried hardly C: hardly tried

All possible means ，but not a means an obvious effect。 A: have been tried; has B: have tried; has C: has been tried; have D: have been tried; have

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

______, he was unable to make much progress. A: Hard as he try B: Hard as he tried C: As he tried hard D: He tried hard