【題目】The rivers will become dirtier and dirtier we take action to protect them.

A. since B. if C. whether D. unless

【答案】D

【解析】

試題分析：句意：如果我們不采取措施保護它們，這些河流會越來越臟。since由于，自從……以來；if 是否，如果；until直到；unless除非，如果不。結(jié)合語境和句意可知選D。

練習冊系列答案
相關(guān)習題

科目：初中英語 來源： 題型：

【題目】The two girls always have a good time _________ the piano together.

A. practice to play B. practicing playing

C. to practice playing D. to practice to play

查看答案和解析>>

科目：初中英語 來源： 題型：

【題目】Please call me______4572354.

A. in B. at C. about D. with

查看答案和解析>>

科目：初中英語 來源： 題型：

【題目】It takes Lisa two hours _______ every day.

A. practise to draw B. practise drawing

C. to practise to draw D. to practise drawing

查看答案和解析>>

科目：初中英語 來源： 題型：

【題目】Who will spend the weekend in the country?
A.Bob.
B.Jack.
C.Judy.

查看答案和解析>>

科目：初中英語 來源： 題型：

【題目】What was Bill doing when it began to rain?
A.He was driving.
B.He was buying a book.
C.He was doing his homework.

查看答案和解析>>

科目：初中英語 來源： 題型：

【題目】選出句子中所包含的信息（ ）
A.People were angry with the players.
B.People were happy to join the players.
C.People were excited to see the players.

查看答案和解析>>

科目：初中英語 來源： 題型：

【題目】 —There are so many interesting books in the library!

— Yeah, but I can’t decide ________.

A. to borrow what B. what to borrow

C. to borrow which D. which to borrow

查看答案和解析>>

科目：初中英語 來源： 題型：

【題目】.----I’d like a cup of black coffee. What about you, Maggie?

--- I prefer coffee______ sugar.

A. than B. for C. with D. to

查看答案和解析>>

同步練習冊答案