The book was his greatest success; with it he ______.
| A．arrived | B．had arrived |
| C．arrives | D．will arrive |
My morning ______ includes jogging in the park and reading newspapers over breakfast.
| A．drill | B．action | C．regulation | D．routine |
Since Tom ______ downloaded a virus into his computer, he can not open the file now.
| A．readily | B．horribly | C．accidentally | D．irregularly |
At minus 130℃, a living cell can be ______ for a thousand years.
| A．spared | B．protected | C．preserved | D．developed |
The traditional view is ______ we sleep because our brain is “programmed” to make us do so.
| A．when | B．why | C．whether | D．that |
______ he referred to in his article was unknown to the general reader.
| A．That | B．What | C．Whether | D．Where |