專四考試中，有語言知識一項(xiàng)，一共有20題，其實(shí)就是詞匯語法題啦。而且不止是語言知識，完形填空也必須用到語法。語法看似簡單，而且都是選擇題，但是也是失分點(diǎn)，為了讓大家保證在這項(xiàng)上不失冤枉分，小編為大家?guī)韺Ｋ恼Z法每日一練，繼續(xù)每天的5題語法專項(xiàng)訓(xùn)練吧！

1. The mother said she would __ her son washing the dishes if he could finish his assignment before supper.
A let down B let alone C let off D let out
　　
2. This kind of material can __ heat and moisture.
A delete B compel C constrain D repel
　　
3. Understanding the cultural habits of another nation, especially __ containing as many different subcultures as the United States, is a complex task.
A one B the one C that D such
　　
4. In order to raise money, Aunt Nicola had to __ with some of her most treasured possessions.
A divide B separate C part D abandon
　　
5. The new appointment of our president __ from the very beginning of next semester.
A takes effect B takes part C takes place D takes turns

（做完后才能看答案哦?。?/span>

1. 選C ①let off原諒，不處罰，放過 With your record, you can hardly expect to let off lightly.
② let down使失望，食言③let alone別管，別煩Let her alone! She didn’t pick a quarrel with you.④ let out讓……離開Open the door and let the cat out.　　 別忘了：)休息一下
　　
2. 選D ①delete消去，刪除 Delete his name from the list of applicants.②compel強(qiáng)迫，迫使（運(yùn)用權(quán)利/力量對方采取行動）He was compelled by illness to give up his studies.③constrain 限制，約束（強(qiáng)調(diào)內(nèi)心情感），后接不定式 His activities must be constrained.④ repel排斥，抵制，防，抗We should not repel but protect young people’s enthusiasm.
　　
3.選A 依語意以句子結(jié)構(gòu)，此處需要一個(gè)代詞，表泛指，則選one;而the one表特指 Please get the chair for me, the one in the corner.
　　
4.選C ①part 不及物動詞 “分別，離別”Scarcely an hour has passed since we parted.②divide分，劃分Is the land to be divided up or sold as a whole?③separate使……分離④abandon拋棄，放棄The order was given to abandon ship.
　　
5.①take effect（藥物）見效，（法律等）生效The new system of taxation will take effect next May.②take part參加③take place發(fā)生，舉行④take turns輪流，依次They are unwilling to take turns at the same computer.?