The new technology will make ________possible to grow food with very little water.
| A．it | B．it is |
| C．that | D．that is |
He can’t help __ housework, for he is busy __ for the examination.
| A．doing; preparing | B． to do; to prepare | C．doing; to prepare | D．to do; preparing |
________her mother had come, her face lit up.
| A．Hearing | B．Having heard | C．When hearing | D．When she heard |
The situation is more ________than ever. I'm ________about what to do next.
| A．puzzled; puzzled | B．puzzling; puzzling | C．puzzling; puzzled | D．puzzled; puzzling |
Linda can't attend the party________ at Tom's house at present because she is preparing a speech for the party ________ at Marie's house tomorrow.
| A．being held; to be held | B．to be held; held | C．held; being held | D．to be held; to be held |
We slept with the light________ all night long last night.
| A．burnt | B．to burn | C．being burnt | D．burning |