________, I could not memorize the text.
A．However hard did I try B．However hard I tried
C．However I tried hard D．However I had tried hard
Raising environmental awareness was the aim of our art exhibition ____ last week.
A．to hold B．held C．having held D．being held
_________ he was, he still went on with his work.
A．Tired although B．Tiring as
C．Tired though D．While tired
It was the training ________ he had as a young man ________ made him so excellent.
A．what; that B．that; which C．that; what D．which; that
Not until she took off her dark glasses ________ she was a famous film star.
A．I realised B．that did I realise C．did I realise D．that I realised
It is ten years since we ________ each other last time．
A．see B．have seen C．saw D．had seen
