Every means ______ tried, but in vain.
A: have been
B: has been
C: are
D: is
A: have been
B: has been
C: are
D: is
举一反三
- 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
- Every possible means ______. A: has tried B: has been tried C: was tried D: were tried
- All possible means __________ been tired.Every possible means __________ been tired. A: have，has B: has，has C: have，have D: has，have
- Every means______tried but with no end. A: have been B: have had C: has been D: are
- Every means ________ been tried ever since the machine brake down.