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2.If our government pay attention to the safety of food, our health in danger.A.isn’t。 is B.doesn’t。 will beC.won’t。 is D.isn’t。 will be【答案】B【解析】【詳解】句意:如果我們的政府現(xiàn)在不注意食品安全,我們的健康就會出于危險之中。結合語境可知,本句主語描述的是將來某時進行的動作,故用一般將來時態(tài)。當主句描述將來時態(tài),if引導的條件狀語從句中用一般現(xiàn)在時態(tài)表示將來動作,結合語境可知選B。13.I didn39。t realize he was a famous scientist you told me.A.until B.because C.since【答案】A【解析】句意:直到你告訴我,我才知道他是一位出名的科學家。A. until到…為止;B. because 因為;C. since既然,因為。本題考查固定句式not…until…直到……才。其用法是如果(主)句中的謂語是終止性動詞,應采用“not…until”結構,意為“到……時候才” 根據(jù)句子結構,結合選項,故選A。14._______riding shared bikes is an easy way to travel, it also causes some problems.A.Although B.If C.Until【答案】A【解析】【詳解】句意:雖然騎共享單車是一種簡單的旅行方式,但也會引起一些問題。A. Although盡管,雖然;B. If如果;C. Until直到。根據(jù)下文it also causes some 。根據(jù)題意,故選A。15.___________ she couldn’t see his face, she could tell by his voice that he was young.A.Unless B.If C.Because D.Though【答案】D【解析】【詳解】句意:雖然她看不見他的臉,但是她能夠通過聲音分辨出他很年輕。A. Unless除非;B. If如果;C. Because因為;D. Though盡管。根據(jù)語境以及上下文,本題考查的是連詞的用法。結合句意可知,在這里兩個句子之間存在一個相反的讓步關系,though/although/even though雖然;盡管,引導讓步狀語從句,符合句意。故答案選D。16.—Tom, you look tired this morning. What’s wrong?—I was so busy that I didn’t go to bed _____ 12 o’clock last night.A.until B.when C.though D.unless【答案】A【解析】本題符合notuntil的結構,表示直到才,故選答案為A17.—I hear Music and Art will enter the Entrance Examination for the high school.— Yes. but don’t worry. Nothing will be difficult if more attention _____ to them.A.will pay B.will be paid C.is paid D.pays【答案】C【解析】句意:——我聽說音樂和藝術將進入高中入學考試?!堑?。但別擔心。如果對他們給予更多的關注,就不會有困難??疾楸粍诱Z態(tài)。本句是if引導的條件狀語從句,需用一般現(xiàn)在時態(tài)代替一般將來時態(tài);從句主語more attention是單數(shù)第三人稱,又是動詞pay的受動者,需用被動語態(tài),即is+paid結構;根據(jù)句意語境,可知選C。18.—____ the workers are very tired, _____they keep