Do you know in what circumstances was it____________ Jack achieved his goal?
| A．how | B．where | C．when | D．that |
______ I always felt I would pass the exam, I never thought I would get an A.
A. While B. Unless C. If D. Until
The English teacherher students how to improve their comprehension skill since last week.
| A．has told | B．is telling | C．has been telling | D．will have told |
Mary ______ all the housework, she dropped herself into the sofa, sighing with relief.
| A．finished | B．had finished | C．having finished | D．finishing |
—How many practical plans has your deskmate made this week?
—. All have turned out disappointing.
| A．None | B．Nothing | C．Nobody | D．No |
Fortunately , the adventurers brought the GPS with themselves, they might have been lost in the desert.
| A．of which | B．without which | C．in which | D．about which |