I do not know whether I can win, but I will try my best.

________ a mobile phone can you ring ______ you wantto talk with anyway

(2013·湖南，34)—I don’t understand why you didn’t go to the lecture yesterday afternoon.—I’m so sorry.But I________my homework

She told her husband that she couldn’t_______ the rest of the housework without his help.

It took him a long time to ______ the skills needed tobecome a professional artist.