When I came back yesterday evening, my brother ________ his homework.
A is doing B. has done C. was doing
There quite a lot of trees on the hill.
| A．were used to being | B．had |
| C．used to have | D．used to be |
—Can you make understood in English?—Yes, I can.
| A．yourself | B．you | C．yours | D．your |
—Look! What's in the tree?
— bird, I think.
| A．不填 | B．A | C．An | D．The |
—I wonder ______ without water.
—For about a week.
| A．how long can a man live | B．how long a man can live |
| C．when can a man live | D．when a man can live |
______ interesting the book is! I want to buy one, too.
| A．How | B．What | C．How an | D．What an |