Mum, have you seen my mobile phone?—The one you bought last week? I’m sorry I haven’t seen ________.

______ have you been learning to play the violin?—Since I was rive years old.

We are organizing a lot of activities to celebrate the _______ birthday of the Communist Party of China these months.

Hi, Peter. Tomorrow is Sunday. Would you like ______ with me?—Yes. Thanks .

Put ________ waste bag into the dustbin, please.— It’s not ________ waste bag. It’s my shopping bag.