I think you could complain, ___, of course, you are happy with the way things are.
| A．when | B．if |
| C．unless | D．while |
.Yang Liwei as well as the other two astronauts _______ to be the most qualified for space exploration.
| A．considered | B．had considered | C．was considered | D．were considered |
____ she looked after the old patient a whole year moves us all.
| A．What | B．That | C．Whether | D．If |
The question of _______ English will continue changing in the future is easy _______.
| A．if; to be answered | B．whether; to be answered |
| C．whether; to answer | D．If; to answer |
She looked around, but the tall man was nowhere______.
| A．to see | B．to be seeing | C．to be seen | D．seen |
The sun was shining brightly, ________ everything there ______ more beautiful.
| A．making, look | B．to make, looked |
| C．and made, looking | D．and making, be looked |