My mom suggest that we           eat out for a change this weekend.

should

might

could

would

考查虚拟语气。句意：我妈妈建议我们这周末出去吃饭换换口味。suggest作“建议”时，后面的宾语从句要用虚拟语气（should）+动词原形。故选A项。

Only when he returned ________ that the war had ended and the army had come back.

we tell

we told

did we tell

were we told

考查倒装句型。Only放在句首时，句子要用倒装语序；根据句意“我们被告知”可知，此处要用were we told。故答案选D。

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。

It is the ability to do the job ______ matters not where you come or what you are.

one

that

what

if

考查强调句。句意：是做这项工作的能力更重要而不是你从哪里来和你是谁。此句是强调句，基本结构是It is/was+被强调部分+that，此处强调the ability to do the job，故选B.

It was last night ________ I saw the comet.

the time

when

that

which

强调句的结构是：It＋be＋强调部分＋that(who)＋主谓句。强调句的连词只有两个，that和who。当强调的部分是人，且为句子的主语时，才用“who”，其余用that。因此选C。