河北省定州中学2017届高三（高补班）上学期周练（9.4）英语试题

河北定州中学2016-2017学年第一学期高四英语周练试题(五) 一、单项选择题 1.-Tell us, Mark, what is the cause of the American Civil War? -Well, is it _the black slaves wanted freedom? A. how B. why C. because D. when 2.- I can’t carry the luggage.It’s so heavy. - Why not have someone strong enough_ you a hand then? A. give B. to give C. giving D. to have given 3.Although she brushed the old pot_, she could not make it completely clean, which made her very upset. A. roughly B. thoroughly C. instantly D. occasionally 4.Mr.Smith is always on time for everything.How _ it be that he was late for the important meeting? A. should B. can C. may D. must 5.-Your grandfather still seems very energetic, although he is already in his seventies now. -Yes, he _in the army for three years when he was young. A. would serve B. served C. had served D. has served 6.Many plants could move northward and toward the Pacific coast _rising temperatures and changes in rainfall. A. for fear of B. in defense of C. by means of D. in reaction to 7.