The Bunsen Burner is so named because it is thought ___________ by Robert Bunsen.
| A．to be invented | B．having been invented |
| C．invented | D．to have been invented |
They are arguing whether they should have respect the beggar..
| A．about, against | B．on, of |
| C．about ,for | D．on, for |
In face of ___________failure, we should keep up ___________ good state of mind instead of being depressed.
| A．不填; a | B．a, the; | C．the; a | D．不填; the |
— Jim, how did your English test go?
— I had thought I ________, but luckily I came top in the list in class.
| A．should have failed | B．could have failed |
| C．need have failed | D．might have failed |
Responsibility for family is ________ happiness exists when you think of your parents and children.
| A．which | B．what | C．where | D．whether |
Look! A crowd of people over there. Go and see what ________ and if it is a bargain, take it.
| A．was selling | B．was being sold | C．is selling | D．is being sold |