Mr. Black walked around and offered help _______ we were doing an experiment.
A: while
B: although
C: until
D: unless
A: while
B: although
C: until
D: unless
举一反三
- 26. We took advantage of its sports facilities _____ staying at the hotel.A) although B) while C) until D) unless A: although B: while C: until D: unless
- We<br/>took advantage of its sports facilities ( ) staying at the hotel. A: although B: while C: until D: unless
- The teacher was critical（）the way we were doing the experiment. A: with B: at C: in D: of
- ____ he were there , he couldn’t help us . A: Even if B: Until C: Till D: unless
- _____ we stood at the top of the building, the people below were hardly visible. A: As B: Although C: Unless D: In spite of