无线电寻呼系统指一种单向广播式无线选呼系统。
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Thiscarisveryexpensive.Youhavetopayhalfamilliondollars________it.
WeshallcancelthecontractifyoufailtoopentherelativeL/C____theendofthisyear.
翻译：WeshallbegladtoshipthegoodsbyadirectsteamertoVaneouverwithin30daysafterreeeiptofyouL/C.
Weshallcertainlycontactyou,assoonasweare____apositiontoentertainnewbusinessinyourdistrict.
is,are,has,have,havingTheaverageBritishfamily,which________smallerandricherthan50yearsago,________3.6members.