The clerks were at work so ____ that nobody realized it was already lunch time

The chang’e-I lesson is that national goals can be met _____there is a strong enough will to do so[ ]

was extremely hot last summer. ,it was the hottest summer of the last 50 years.

When I was in kindergarten, I was often _____ by my teachers to be polite to the adults.

advises the thief______ into prison.