题目

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。 In Canada and the United States, people enjoy entertaining(请客) at home. They often invite friends over a meal, a party, or just for coffee and conversation. Here are the (kind) of things people say when they invite someone to their home: Would you like to come over for dinner Saturday night?” Hey, we(have) a party on Friday. Can you come? (reply) to an invitation, either say thank you and accept, or say you're sorry and give an excuse: Thanks, I'd love to. What time would you like 若关于x的一元二次方程3x2+k=0有实数根，则（　　）A．k＞0B．k＜0C．k≥0D．k≤0