An apology letter can be sent at any time.
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 air （） it might reach them in good time. A: if B: so that C: since
- You can ______ me on this number any time.
- 6. GPS determines location by computing the difference between the time a signal is sent and the time is received. GPS satellites carry ______ that provide extremely accurate time. The time information is placed in the codes broadcast by the satellite so that a receiver can continuously determine the time the signal was broadcast.