We sent the letter by air （） it might reach them in good time.
A: if
B: so that
C: since
A: if
B: so that
C: since
举一反三
- We sent the letter by airmail _________it might reach them in good time.
- We sent the letter by airmail in order that it might reach them in good time.
- We sent the letter by airmail in order that it might reach them in good time.本句中的从句是 ，为 引导的 从句。
- It (be) ____ a long time since we met last time.
- The goods were of poor quality so we ____________. A: returned them B: sent them back