某有机化合物的结构简式为,它可以发生的反应类型有①取代反应 ②加成反应 ③消去反应 ④酯化反应 ⑤水解反应 ⑥中和反应
What I need is_____ book that contains ______ABC of oil painting.
Jenny nearly missed the flight______ doing too much shopping.
The CDs are on sale! Buy one and you get ______ completely free.
I’m sure that your letter will get______ attention. They know you’re waiting for the reply.
All the dishes in this menu, ______ otherwise stated, will serve two to three people.