(单选题)19: While he was investigating ways t improve the telescope Newton made _______discovery which completely changed ____ man’s understanding of color. A: a,/ B: a,the C: /,the D: the,a ...

(单选题)13: —I really don’t know how to thank you enough． — ． A: Noproblem B: Thinknothingofit C: Withpleasure D: Gladtohearthat ...

(单选题)7: When did you arrive in Beijing?        - __________. A:  nobody informs me.                   ...

(单选题)1: The engineers are planning to ______________ oil with some kind of material for the engine. A: substitute B: place C: replace D: instead ...

(单选题)15: He has__ books in his study. A: severalthousands B: somethousandsof C: somethousands D: somethousandof ...

(单选题)9: There are_________ of visitors to Kunming. A: tensofthousands2000 B: abouttenofthousands C: aboutthreethousands D: aboutthreethousand ...

(单选题)3: They sold __boxes of such sweets last week. A: four dozen B: four C: four dozen of ...

(单选题)17: Either you or the headmaster __the prizes for these gifted students at the meeting. A: ishandingin B: aretohandout C: arehandingin D: istohandout ...

(单选题)11: He behaves so rudely that Mary decided to __________ him. A: neglect B: careless C: ignore D: inquire ...

(单选题)5: Choose the best topic sentence from the group below. A: More and more students have part-jobs out of campus. B: The population of university students having part-time jobs is increasing quickly. C: Part-time jobs can foster un...