—Simon，I wonder _______. —Last Saturday.
| A．when the foreign visitors arrived | B．when did the foreign visitors arrive |
| C．when the foreign visitors will arrive | D．when will the foreign visitors arrive |
When I heard the story, I couldn’t help ________________.
| A．laughing | B．laughs |
| C．to laugh | D．laugh |
Our hometown ________________ a lot in the past ten years.
| A．change | B．changed |
| C．has changed | D．was changing |
The teacher asked _______________.
| A．what wrong with Sally | B．what wrong was with Sally |
| C．what was wrong with Sally | D．what is wrong with Sally |
We are very tired after a long walk. Let’s stop_________ a rest.
| A．have | B．having |
| C．to have | D．has |
_______ it rained heavily, ________ all the students came to school on time.
| A．Because; so | B．Because; / |
| C．Although; / | D．Although; but |