The old professor told us that every part of the materials should be made use of _____ the station.
| A．building | B．to build | C．build | D．being built |
Many scholars and experts from all over the world will be invited to attend this yearly ___ on drug control.
| A．reference | B．intention | C．conference | D．interaction |
. My grandmother likes to surprise people. She never calls ___ to inform us of her visits.
| A．beforehand | B．anyhow | C．originally | D．consequently |
Julie wants to buy a ___ computer so that she can carry it around when she travels.
| A．memorable | B．portable | C．predictable | D．readable |
In order to write a report on stars, we decided to ___ the stars in the sky every night.
| A．design | B．seize | C．quote | D．observe |
I called the airline to ___ my flight reservation a week before I left for Canada.
| A．expand | B．attach | C．confirm | D．strengthen |