To save class time, our teacher has ______students do half of the exercises in class and complete the other half for homework.
| A．us | B．we | C．our | D．ours |
Last month we students all had some great speeches. The headmaster together with some other teachers __________ to attend it, too.
| A．were invited | B．was invited |
| C．has invited | D．invited |
---Is Johnson on duty today?
---It ________ be him, but I’m not sure.
| A．will | B．may |
| C．need | D．must |
Mary’s mother told her daughter not to spend too much time surfing the Internet, but ______ didn’t help.
| A．this | B．that | C．it | D．which |
The firefighters would not allow anyone______ into the room on fire to collect anything.
| A．to go | B．going |
| C．gone | D．go |
_______ the Water Cube, we were surprised by the design.
| A．See | B．Saw |
| C．To see | D．Seeing |