题目

从方框中选择合适的选项补全对话。(有两项多余)A：Hello，George! B：Hi，Diana!A：You have a nice room.【1】B：It's my tennis ball.A：I like tennis.【2】 Do you have tennis bats?B：【3】 I only have a tennis ball.A：Oh，we can't (不能) play tennis now.B：【4】 We can ask her for the bats.A：【5】 Let's go!B：OK. A．That sounds great!B．Where's your tennis ball?C．What's that under the desk?D．Yes，he does.E．My sister Susan has two tennis bats.F．No，I don't.G．I think it's an interesting game.现有氯化氢、二氧化硫、水银、氢气四种物质，其中：（1）属于氧化物的是______；（2）不含氧元素的化合物是______；（3）由原子构成的单质是______，由分子构成的单质是______．