The past two years ________ a sharp rise in oil price，which adds to the burden of auto transportation industry.
| A．witnessed | B．has witnessed |
| C．is witnessing | D．witnesses |
Tell me about it ---don’t _____ anything ______!
| A．hold; back | B．hold; on | C．hold; up | D．hold; out |
______ the term is finished, I’m going to rest a few days and then take a trip.
| A．Now that | B．Even if | C．As if | D．So that |
It is known that water is not ___ endless resource , nor ____ that can be made once more.
| A．the;/ | B．an; one | C．an ;that | D．/;one |
_____in the queue for half an hour, the old man suddenly realized he had left the money in the car.
| A．Waiting | B．To wait | C．Having waited | D．To have waited |
____ was known to all, John had broken his promise ___ he would stay with us for some time .
| A．As; that | B．As; which | C．It; that | D．Which; that |