The scientist said videophone could be used ___ the conferences

You should talk to your parents and you will get help ________ you have a problem.

将下列句子组成一个语段,顺序恰当的一项是(　　)①语段,又叫句群,是由句子组成的语言表达单位。②它是建筑在逻辑思维基础上的表意“层次”。③语段正是这样一个相对独立的较大语义单位。④但是,要表达多方面的、比较复杂的思想,往往需要把几个句子组织起来,结成更大的言语片段,以表达“一层”的意思。⑤我们知道,句子在一定的语言环境中能够单独地使用,能够单独地表达相对完整的思想。⑥它是句子和语篇之间的中间层次。

He bought his girlfriend diamondring, but he was told that diamondin that ring was an imitation glass.

184. There’s no wind now. We can’t _______ kites on the playground.