The elderly need special care in winter, as they are to the sudden changes of weather.

Uncle Tom will come to visit _____ next Saturday.

The notice came around two in the afternoon ________ the meeting would be postponed.(2012·江苏)

How long have you lived in the new flat—________ 2010.

Sales of CDs have greatly increased since the early 1990s, when people _____ to enjoy the advantages of this new technology[ ]