Those passengers will wait here____ the bus arrives.( )
A: until
B: because
C: though
D: as
                    A: until
B: because
C: though
D: as
举一反三
- Those passengers will wait here____ the bus arrives.
 - Those passengers will wait here___ the bus arrives. A: until B: unless C: as D: when
 - 18.  A: unless B: because C: though D: until
 - 17. A: because B: unless C: until D: though
 - We won’ t leave here until he______ . A: is arriving B: arrives C: was arriving D: will arrive
 
