When lost in work , ______ he often was , he would forget all about eating and sleeping.
| A．what | B．as | C．just like | D．so |
Scientists say human activity contributes to climate change, but they do not agree on the rate_______ climate change may be developing.
| A．with which | B．with that | C．at which | D．at 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 |