词汇网络: killingly

永远消除事物 (Do away with)

prepositions

C1

使用“Let's”提出建议

verb_moods

A2

英语时间习语：在千钧一发之际 & 是时候了

advanced_syntax

C1

Wh-ever 从句：将 'Whatever' 和 'Whoever' 用作主语（名词性关系从句）

sentence_structure

C2

过去完成进行时 (had been -ing)

verbs_tenses

B1

一石二鸟 (yī shí èr niǎo)

To accomplish two things with one action

B1

kill time

Do something while waiting.

A2

闲等

To stay in one place without doing anything productive while waiting for something or someone.

B1

Kill time.

Pass time with an activity.

A1

Kill two birds with one stone.

Achieve two goals

A1

To kill two birds with one stone.

Achieve two goals at once

A2