—Excuse me, can I smoke here?
—No, ____________ .
A：you must
B：you'd not better
C：you can
D：you'd better not
—Hey, Mary. Is the film ________?
— Hi, Tom. I think the film is ________.
读一读，选一选。
What colour What's They're white can't
与拉丁美洲独立运动性质相同的是（ ）
在进行嫁接时，要将砧木与接穗的形成层紧密结合，目的是（ ）
