重点讲解：
1. make headway 前进；取得进展；
例句：There was concern in the city that police were making little headway in the investigation.
警方在调查中未能取得什么进展，对此市民有些担心tC-vz#CO%FLD527TbX。
2. due to 由于；因为；
例句：It was a real prize due to its rarity and good condition.
因为稀有并且品相完好，它价值连城3o81XTmty-+.e。
3. lack of 缺乏；不足；没有；
例句：She wrinkled her nose, piqued by his total lack of enthusiasm.
她皱皱鼻子，为他毫无热情而感到不快1AI#p@AmV9b=CAf。
4. too...to... 太……以致不能……；
例句：He's too spineless to ask for more money.
他没有勇气要求更多的钱1,M|j#_W(uLo_-w。
5. be expected to do sth. 预期；预料；
例句：A big hurricane is expected to hit this weekend.
本周末将有一场猛烈的飓风袭来V#d^S-P.b!NEOQ。