He rushed as fast as he could, ______not to be late for class.
Modern plastics can _________ very high and very low temperatures.
---What does PM2.5 mean?--- It’s a professional ______ indicating the condition of air pollution.
--- How are things going, Janet?--- They have set out to deal with the present situation ______ they think deserves their immediate attention.
--- Do you have the time?--- Yes. But... my watch is not very __________.
---How old can you guess your new English teacher is ?--- It’s hard to say. But I guess him to be _____between 35 and 40.