初中英语选择题（请加解析）

1.We say"Good morning" to our teachers _____every morining.

A.with a voice B.in a voice C.with one voice D.in one voice

2.We should learn more to meet the ___of our country

A.need B.necessary C.needs D.unnecessary

3.How long has he___Washington D.C?——For 3 weeks.

A.left B.left off C.been from D.been away from

给出答案后请加上分析，重要的是分析

B.in a voice（固定的搭配） C.needs（固定搭配） D.been away from因为后面回答是‘for’3 weeks是一个时间段，所以要用持续性

B ,固定的搭配 C 名词复数 D Have \has been done

基本上同上一样