How long do you think it was ______ he got home in such bad weather?
| A．when | B．since | C．that | D．before |
makes the book so extraordinary is the creative imagination of the writer.
| A．That |
| B．What |
| C．Who |
| D．Which |
The chair looks rather hard, but in fact, it is very comfortable to
.
| A．sit |
| B．sit on |
| C．be sat |
| D．be sat on |
American Indians about five percent of the US population
| A．fill up |
| B．bring up |
| C．make up |
| D．set up |
We cannot figure outquite a number of insects, birds and animals are dying out.
| A．that |
| B．as |
| C．why |
| D．when |
They decided to turn to can help them out of difficulty.
| A．whoever |
| B．who |
| C．anyone |
| D．someone |