I drink a cup of coffee           ; but usually I take tea.

frequently

often

constantly

occasionally

考查副词词义辨析。句意：我偶尔喝一杯咖啡，但我通常喝茶。A. frequently频繁地；B.often经常地；C.constantly连续不断地；D.occasionally偶尔地。but 表转折关系；根据后半句的usually,前面用occasionally,与usually意思相对。故选D项。

When Huawei P20 came out,         people couldn't wait to buy one in our town.

thousand

thousands

thousand of

thousands of

考查数词的用法。句意：当华为P20上市时，成千上万的人迫不及待的想在我们镇上买一台。thousnad意思是“千”，其前有具体数词修饰时，用其单数形式；当其前没有具体数词修饰时，用其复数形式，且与of 连用，thousands of“成千上万的”，这里没有具体数词修饰。故选D项。

If you work hard like this, you will           sooner or later.

give out

break up

break down

fall down

考查动词短语。句意：如果你继续这样辛苦工作的话，你迟早垮掉。A.give out分发 ；B.break up打碎；C.break down垮掉；D.fall down 跌倒。根据句意可知break down符合语境。故选C项。

A bank is a place         they lend you an umbrella in a fair weather and ask for it back when it begins rain.

when

where

that 

there

考查定语从句。句意:银行就是一个天气好时借给你雨伞，开始下雨时再要回来的地方。A.when关系副词，做时间状语 ；  B.where关系副词，做地点状语；C.that 关系代词；D.there 那里。分析句子可知，空格处引导定语从句，关系词代替先行词 place，在从句中充当地点状语，应用关系副词where。故选B项。

Look! There is         over there. Do you know him?

a 8-year-old boy

an 8-year-old boy

a 8-years old boy

an 8-years old boy

考查形容词和冠词。句意：看！那边有一个8岁的男孩。你认识他吗？空格处为复合形容词作定语，其基本构成形式是：数词+名词（单数）+形容词，并且要用连字符连接，排除C和D项；8发音以元音音素开头，需用不定冠词an修饰。故选B项。

The most important promises we must keep are          we make to ourselves.

ones

those

these

them

考查代词。句意：我们必须遵守的最重要的承诺就是我们对自己做出的承诺。A. ones泛指上文提到的可数名词复数；B. those特指上文提到的可数名词复数；C. these这些；D.them他们。分析句子可知，为we must 是定语从句，修饰The most important promises，是句子的主语；be动词后缺少表演，we make to ourselves是定语从句，修饰空格处。根据句意，此处指上文提到的promises,由定语从句修饰表示特指，故用 those。故选B项。