________theconcerthadbegundidwerealizewhatasplendidshowitwasgoingtobe.
A、NosoonerWeregretto________thatitmaynotbepossibletodealwitheveryrequest.
________theconcerthadbegundidwerealizewhatasplendidshowitwasgoingtobe.
It'smore________tobuyaseasonticketifyoutraveleveryday.
ItwasthreeBritishsportsmenwho________banneddrugs.
Itisusefultoscience_______theearthasanobjectinspace.