4 sentences for 期 (qī — period)

1. 这个学期下个月结束。

   zhè gè xué qī xià gè yuè jié​shù.

   This semester ends next month.

   Source: Dong Chinese Dictionary

2. 长达八年的战争终于迎来了休战期。

   cháng​dá bā nián de zhàn​zhēng zhōng​yú yíng​lái le xiū​zhàn qī.

   The eight-year-long war has finally entered a period of truce.

   Source: Dong Chinese Dictionary

3. 这项新政策为市场提供了一个月的缓冲期。

   zhè xiàng xīn zhèng​cè wèi shì​chǎng tí​gōng le yī gè yuè de huǎn​chōng qī.

   This new policy provides the market with a one-month buffer period.

   Source: Dong Chinese Dictionary

4. 由于处于叛逆期，这个孩子总是和老师对着干。

   yóu​yú chǔ​yú pàn​nì qī, zhè​ge hái​zi zǒng​shì hé lǎo​shī duì​zhe​gàn.

   Being in his rebellious phase, the child is always defying his teachers.

   Source: Dong Chinese Dictionary