—Did the boy break the window ______?
—No. They did it when they were playing football.
| A．by accident | B．on purpose |
| C．at dusk | D．as usual |
---I hear you’ve got a set of valuable stamps. ______ I have a look?
---Yes, certainly.
| A．Do | B．May | C．Shall | D．Should |
---Let’s go shopping after school.
---______ Call for me at any time.
| A．That depends. | B．Hold on, please. | C．What for? | D．Sounds good. |
---Della, would you like some potato chips?
---No potato chips for me---I’m ______ a diet.
| A．at | B．in | C．on | D．with |
Harry has been reading all day---he ______ be tired.
| A．should | B．has got to | C．has to | D．must |
Children have a natural ______ about the world around them. They are interested in everything.
| A．concern | B．purpose | C．curiosity | D．strength |