The fast popularity of cloud computing means netizens will need to take added measures to make sure their data stay __________in the digital age.
| A．accurate | B．stable | C．unknown | D．secure |
________ it is true that a student's most important goal is to do well in his or her studies，it doesn't need to be the only goal.
| A．When | B．As | C．While | D．Before |
Having had a heated discussion, the congress________the new measures.
| A．adopted | B．adapted | C．took | D．hosted |
The girl can ride a horse and swim，and she can shoot________.
| A．all | B．as well as | C．either | D．as well |
The door opened and in________.
| A．he came | B．came he |
| C．did he come | D．did Mr.Smith come |
You can take anything from the shelf and read，but please ________ the books when you've finished with them.
| A．put on | B．put down | C．put back | D．put off |