.
Out of the crowded bus______,who was dressed in a black suit and waved to a woman.
| A．a tall man in his thirties stepped | B．stepped a tall man in his thirties |
| C．did a tall man in his thirties step | D．did a tall man step in his thirties |
You must notice ________ the emergency exit is when you enter the building.
| A．which | B．where |
| C．what | D．in which |
Although he has become wealthy, Mr. Wood remains ________ he used to be, modest and friendly.
| A．when | B．where |
| C．how | D．what |
—How do you think I can make up with Tom?
—Put aside ________ you disagree and try to find ________ you have in common.
| A．what; what | B．where; what |
| C．what; whether | D．where; whether |
It remains to be seen ________ this plan is practical enough to keep the project going.
| A．whether | B．how |
| C．where | D．when |
Helen has got ________ it takes to be a great tennis player. In other words, she has the potential to become world famous.
| A．how | B．what |
| C．when | D．that |