.
Nancy enjoyed herself so much ___ she visited her friends in Sydney last year.
| A．that | B．since | C．when | D．where |
In the dark street there wasn’t a single person _____ Mary could turn for help.
| A．to whom | B．to which | C．on whom | D．on which |
By the time the tornado ended, more than 2,000 people _____.
| A．has injured | B．has been injured |
| C．had injured | D．had been injured |
Generally speaking, clothes made of man-made materials is less comfortable than _____ made of natural fibers like cotton, wool or silk.
| A．that | B．it | C．those | D．One |
The old buildings, _____ the seventeenth century, were destroyed in the earthquake.
| A．date from | B．dating from | C．dated from | D．to date from |
---- Tim was seriously hurt in the match and sent to hospital.
---- _____, let’s go and see him.
| A．If so | B．If not | C．If necessary | D．If any |