——Were you busy last weekend?——Very. Rather than ____ time playing cards as usual, I devoted every effort to ____ an advertisement.
The actress received an award for her ________ to charity work.
We need an effective strategy to help children living in ________ poverty to have the opportunity to receive ________ good education.
—What does PM2.5 mean?—It's a professional ________ indicating the condition of air pollution.
Some students think they enjoy reading just out of interest, but others argue that a better score is their main ________.
Currently, many American women are still faced with the ________ of choosing between work and family commitments.