The trouble with such resources as coal, oil and gas ______ that they are not renewable.
—How about getting a part-time job during the summer holidays?— , but I have promised to visit my cousin in Japan.
Receiving the report that the plane crashed, the government took measures .
Newton was sitting under an apple tree ______ an apple fell onto his head.
The clock has just _________ twelve. All the teachers should stop _________ and let the students have a rest.
A thunderstorm is likely to come. Let’s hurry up so as not to __________ it.