I'm planning to hold a party in the open air, but I can make no guarantees (保证) because it ______ the weather.
A：depends on
B：connects to
C：decides on
D：touches with
根据句意及首字母提示完成单词。
①试管 ②烧杯 ③试管夹 ④酒精灯 ⑤蒸发皿 ⑥石棉网 ⑦铁架台（带铁圈）
选词填空
我________帮他打扫教室，可是他不肯。（ ）
