Although it was not named ________ 1782, this kind of metal was used as early as 5300 BC．
A．in B．for C．until D．since
---- How did you find the rock music concert last night?
---- _____.
| A．I went there by bike | B．I’ll do my best |
| C．It was fascinating | D．You are absolutely right |
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 |