We have to work hard,（）we’ll lose the chance.
A: therefore
B: otherwise
C: besides
D: however
A: therefore
B: otherwise
C: besides
D: however
举一反三
- Progress so far has been very good. ______ , we are sure that the project will he completed on time. A: However B: Otherwise C: Therefore D: Besides
- —Would you like to go to the concert with me, Mary —I have got no interest in it; （）, I have lots of work to do. A: otherwise B: besides C: however D: therefore
- 中国大学MOOC: As the president of the company, I pl____ that we’ll work very hard and by next year we will have this problem solved.
- -Have you finished the work?-Not yet, but no matter how hard it is, we'll keep _______until we make it. A: failed B: trying C: tried D: failing
- The task is hard, (), the workers managed to finish it in time. A: therefore B: otherwise C: however D: yet