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
More wild tigers have been seen in the forest around this area, ________ there used to be very few.
A．when B．where C．what D．which
It is usually warm in my hometown in March, but it ________ be rather cold sometimes.
A．must B．can C．should D．would
You can never be ________ when crossing the street．
A．very careful B．too careful
C．carefully enough D．enough careful
________, you need to give all you have and try your best．
A．Being a winner B．To be a winner
C．Be a winner D．Having been a winner
