When the lawyer asks you questions about the case, you should be________.
| A．on duty |
| B．on guard |
| C．on purpose |
| D．on watch |
Has the boy who was made use of _______ realized the mistake?
| A．stealing | B．stolen | C．to steal | D．for stealing |
_______ you call me to say you’re not attending my birthday party, I’ll see you at it.
| A．Whether | B．Though | C．Until | D．Unless |
Britain’s Prince William and Kate Middleton will marry next year in Westminster Abbey, _______ Princess Diana’s funeral was held.
| A．when | B．which | C．where | D．as |
If the printer_______ break down under guarantee, we would repair it at our expense.
| A．may | B．could | C．might | D．should |
— I telephoned him twice and I couldn’t get through to him.
—I think that the line might have been out of order, _______?
| A．don’t you | B．wasn’t it | C．do you | D．hadn’t it |