Between the two parts of the concert is an interval, __________ the audience can buy ice-cream.
| A．when |
| B．where |
| C．that |
| D．which |
Sarah looked at finished painting with satisfaction.
| A．/; a |
| B．a; the |
| C．the; / |
| D．the; a |
Scientists study human brains work to make computers.
| A．when |
| B．how |
| C．that |
| D．whether |
Mother asked the youngest girl with her toy car.
| A．what the matter was |
| B．what was the matter |
| C．what the matter is |
| D．what is the matter |
The teacher said light much faster than sound.
| A．travel |
| B．travels |
| C．travelled |
| D．traveled |
Tom Hanks told us that he born in 1980.
| A．was |
| B．had been |
| C．is |
| D．has been |