All the workers think it very necessary to safety regulations and workshop
rules.
| A．campaign | B．inspire | C．confuse | D．observe |
If the weather had been better, we could have had a picnic. But it ___ all day.
| A．rains | B．rained | C． has rained | D．is raining |
I like getting up very early in summer. The morning air is so good ____
| A．to be breathed | B．to breath | C．breathing | D．being breathed |
One of the most important questions they had to consider was ___________ of public health.
| A．what | B．that | C．this | D．which |
______ not to miss the flight at 14:23, the manager set out for the airport in a hurry.
| A．Reminding | B．Having reminded | C．To remind | D．Reminded |
For a moment nothing happened. Then ___ all shouting together.
| A．voices had come | B．came voices |
| C．voices would come | D．did voices come |