He pretended not to care but that remark _________ his real opinion on the matter.
---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.
We need an effective strategy to help children living in ______ poverty to have the opportunity to receive _______ good education.