A warning signal suddenly appeared on the screen of my computer, ______ the computer was being attacked by a certain virus.
| A．indicated | B．indicating |
| C．to indicate | D．having indicated |
Friends are angels who lift us to our feet _______________ our wings have trouble remembering how to fly.
| A．unless | B．because | C．though | D．when |
To be honest, I tend to agree with Shirley, though not _______________.
| A．entirely | B．eventually | C．widely | D．possibly |
Some seemingly harmless blogs might become harmful when ________ on the Internet by millions of people.
| A．to read | B．reading | C．read | D．being read |
It is not failure itself but the attitude we have towards it __________ matters.
| A．which | B．what | C．that | D．as |
The hurricane and the damage ___________ caused have done much harm to the United States.
| A．that | B．it | C．what | D．when |