【题目】My brother tried his best ________ up. Finally, he reached the top of the mountain.

【题目】We should use china cups because we can ________ them.

【题目】Smoking is ________ to you.

【题目】—Do you know ________ have our summer holiday?

【题目】Someone ______ at the door. Can you open it?

【题目】—Where are my books? —Sorry,________.

【题目】—Is the girl ________English? —Yes, she is.

【题目】Eric arrived on time, _______ it was the rush hour.

【题目】It is our hope that we can live in a ________ world and say goodbye to wars forever.

【题目】Sorry, this is not ________ruler. It’s my sister’s.