填空

l. I want            _____( go) to play football.

2. I know she's not _____( go) to get into trouble.

3. Why            _____( not tell) him the fact?

4. —Let's go _____( shop).

    —No,not today.

5. —Shall we_____( talk) about these cars?

    —Sure.

6. I think the_____( cool) thing is that they trust me.

如图是甲、乙、丙三种物质（均不含结晶水）的溶解度曲线．在t₃℃时，甲、乙、丙三种物质的饱和溶液（无固体存在），进行下列操作，下列说法正确的是

A.t₃℃时，将三种饱和溶液分别恒温蒸发相同质量的水析出晶体度最多的是甲

B.t₃℃时，将三种饱和溶液分别降温到t₁℃. 析出晶体最多的是甲

C.t₃℃时，将三种饱和溶液分别降温到t₁℃，所得溶液中溶质质量分数大小顺序为乙＞甲=丙

D.丙中有少量的甲时．可以用降温结晶的方法提纯丙