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產(chǎn)生的相關(guān)的結(jié)果,主句用一般將來時(shí)態(tài),從句用一般現(xiàn)在時(shí)態(tài)。選項(xiàng)的位置在 if 引導(dǎo)的條件狀語(yǔ)從句中,要用一般現(xiàn)在時(shí)態(tài),B C選項(xiàng)是將來時(shí)態(tài)不符合題意要排除。D選項(xiàng)是現(xiàn)在完成時(shí)態(tài)不符合題意要排除。Reach an agreement達(dá)成協(xié)議固定短語(yǔ)搭配。agreement is reached協(xié)議做主語(yǔ)要用被動(dòng)語(yǔ)態(tài),故選A。【點(diǎn)睛】if 條件句不一般,幾個(gè)要點(diǎn)記心間。條件句,放在前,逗號(hào)要放句中間。條件句表可能,主句多用將來時(shí);條件句表事實(shí),主句常用現(xiàn)在時(shí)。在 if 引導(dǎo)的條件狀語(yǔ)從句中,如果從句談?wù)摰氖且粋€(gè)有可能發(fā)生的事實(shí)及其產(chǎn)生的相關(guān)的結(jié)果,主句用一般將來時(shí)態(tài),從句用一般現(xiàn)在時(shí)態(tài)。如: We can walk there if we can39。t find a bus. If it rains tomorrow, we will not go to the zoo. What will you do if you find a panda in danger.如果 if 條件句談?wù)摰氖侵貜?fù)發(fā)生和預(yù)示要發(fā)生的情景和事件,則主從句大多用一般現(xiàn)在時(shí)態(tài)。如: If bears are in danger, they attack people.注意 :在 if 引導(dǎo)的條件狀語(yǔ)從句中,if 和條件句位置靈活,可直接放在主句后面,若 if 條件句放句首,從句后面要加逗號(hào),和主句隔開。還要注意前后時(shí)態(tài)一致原則。13.Could you give me some advice on travelling?Take a map with you _______ you have a guide or you know the city very well.A.if B.unless C.a(chǎn)lthough D.because【答案】B【解析】句意:你能給我一些關(guān)于旅行的建議嗎?如果沒有向?qū)Щ蛘邔?duì)城市不很了解,那么就隨身帶著一張地圖。A. if如果; B. unless除非;如果不; C. although雖然,盡管; D. because因?yàn)?。根?jù)句意故選B。14.I will go to the English club tomorrow I am too busy.A.since B.if C.unless D.until【答案】C【解析】【詳解】句意:明天我將會(huì)去英語(yǔ)俱樂部,除非我太忙。since自從;if如果;unless除非,如果不;until直到…時(shí)候。根據(jù)句意可知,這里表示的意思是“如果我不忙,我會(huì)…”,故應(yīng)選C。15. He made a mistake, but then he took action to change the situation ________ it got worse.A.until B.when C.before D.because【答案】C【解析】試題分析:句意:他犯了一個(gè)錯(cuò)誤,但他在它變得更糟前采取了行動(dòng)改變現(xiàn)狀。Until直到;when當(dāng)時(shí);before在之前;because因?yàn)?。根?jù)句意可知選C。考點(diǎn):考查連詞。16.Lin Shuhao is ________ famous ________ all the basketball fans in China knows him.A.too, to B.enough, to C.so, that D.a(chǎn)s, as【答案】C【解析】【詳解】句意:林書豪如此出名以至于在中國(guó)所有的籃球迷都知道他??疾檫B詞用法。too+形容詞或副詞+to do sth.:太……而不能;enough+形容詞/副詞+to do sth.:足夠……以至于……;so+形容詞/副詞+that+句子:如此……以至于……;as…as:與……一樣……。故選C。17.There are fewer and fewer tigers in India. The situation will continue _______ humans stop hunting th