【题目】An e-book is ________ than a paper one among students today.

【题目】Tony likes surfing the Internet, ________ he never plays online games.

【题目】We ________ wear masks to keep away from COVID-19 in public.

【题目】— ________may I keep the book, madam?

【题目】—Where is your sister, Tina?

【题目】My grandpa lives alone in the countryside. I often visit ________ at weekends.

【题目】— Do you know ______? （ ）

【题目】The Olympic Games ______ in Tokyo in 2021.

【题目】Emma ______ to play the piano when she was six years old.

【题目】— Which do you think is ______, dumplings or noodles?