【题目】Helen was very rude to me. I refuse to speak to her again __________ she says sorry.

【题目】Every time Tom is late, he'll ___________ an excuse. So I wonder what his excuse is this time.

【题目】The ____________ that there is life on other planets has always encouraged scientists to explore the outer space.

【题目】—I didn't see you at Jim's party last week. —I had to work that evening, so I _________ go.

【题目】The path was covered with snow, so we walked very _______. We were afraid of falling.

【题目】—___________ can you write in English?

【题目】It's important for us ___________ good manners.

【题目】Which do you like __________, juice or Cola?

【题目】I’ll be at home __________ Sunday morning. You can phone me then.

【题目】Millie has some new friends. She likes to play with _________ after school.