16.This is thephoto I have ever taken.A worse B better C best Dmost worst 17.As they can't afford to let the situation get worse,they will take some necessary .A decisions B sides C directions D steps 18.The girl sometimes has difficultywhat the teacher say in class.A understand B understanding C to understand D understood 19.You yesterday if you were really serious about the job.A ought to e B ought to be ing C ought to have e D ought have e 20.Milk bottles need cleaning thoroughly before they are used again, they?A don't B mustn't C needn't D aren't 英语
网友回答
【答案】 16.D这里需要最高级 17.Dtake steps采取措施 18.Bhave difficulty+doing 19.C与过去事实相反的虚拟语气ought to+have+过去分词 20.A 反义疑问句,前面是肯定句,所以后面用否定形式.