Because of ______high demand for Type AB blood，____supplies of it are usually limited．
| A．the；the | B．不填；不填 | C．不填；the | D．a；the |
To be well-informed, we should be _____ communicationeach otherwhat happens to us.
| A．on, for, about | B．in, for, for | C．with, by, at | D．in, with, about |
What shall we use for power when all the oil in the world has _________?
| A．given out | B．put out | C．held up | D．used up |
Your uncle seems to be a good driver: _______, I wouldn’t dare to travel in his car.
| A．even so | B．even though | C．therefore | D．so |
Seeing the car trapped in the snow drift, the driver didn’t know ______ it.
| A．how to do | B．what to do |
| C．how to deal with | D．how to do with |
________ English will help to communicate _____ people from different countries in the world.
| A．Known; with | B．Knowing; with | C．To know; to | D．To know; in |