When exposed to stress, in ________ form, all of us react both chemically and physically.
| A．whichever | B．whatever | C．however | D．whenever |
It may be necessary to stop _____ in the learning process and go back to the difficult points in the lessons．
| A．at intervals | B．at random |
| C．at ease | D．at length |
—Where would you like to sit? In the corner or near the platform?
—______．I would like to sit by the piano so that I can watch the musician play．
| A．Either | B．Neither |
| C．None | D．Both |
Life is like __________ ocean; only __________ strong-willed can reach the other shore.
| A．an; the | B．the; a | C．the; / | D．/; a |
--- Kim, give me your report by 1O am.
--- __ have you been in charge of this project?
| A．Since when | B．By whom |
| C．For what | D．From where |
–What’s that noise?
–Oh, I forgot to tell you. The new machine ______.
| A．was tested | B．will be tested |
| C．is being tested | D．has been tested |