---You aren’t looking well. Anything the matter?---I’ve been surfing the net too long. I’m a bit tired.I can hold on,____.
This machine, ______for many years, is still working perfectly.
This is the reason ______he didn't come to the meeting.
The way ______he looks at problems is wrong.
I can never forget the day _______ we worked together and the day ______ we spent together.
I have bought such a watch _______ was advertised on TV.