________we have enough evidence，we can’t win the case.
A: once
B: as long as
C: unless
D: since
A: once
B: as long as
C: unless
D: since
举一反三
- 中国大学MOOC: ________we have enough evidence，we can’t win the case.
- We _______ enough time.So we can go to the park on foot. A: don't have B: have C: has D: had
- ______ we know the facts, we can’t do anything about it. A: As long as B: When C: Once D: Until
- We'll have a picnic in the park this Sunday ____ it doesn't rain . A: since B: if C: unless D: until
- Since the party has been called off, we _______ decorate this house. A: can B: can’t C: have to D: don’t have to