(单选题)5: 胎儿期和新生儿期缺乏下列哪种微量元素可引起小儿呆小症，又称克汀病？（ ） A: 砷 B: 锌 C: 碘 D: 硒 E: 镉 ...

(单选题)49: The shopkeeper did not want to sell for ___ he thought was not enough. A: where B: how C: what D: which ...

(单选题)43: Many people who had seen the film were afraid to go to the forest when they remembered the scenes ___people were eaten by the tiger. A: in which B: by which C: which D: that ...

(单选题)37: He abandoned a career that ____ to his becoming one of the most influential people in the world. A: could have led B: would lead C: should have led D: must lead ...

(单选题)31: Only then___how much damage had been caused. A: she realized B: she had realized C: had she realized D: did she realize ...

(单选题)25: Scientists have many theories about how the universe ___ into being. A: came B: was coming C: had come D: would come ...

(单选题)19: If I can help___, I don't like working late into the night. A: so B: that C: it D: them ...

(单选题)13: I believe you have____your purse in the living-room. A: left alone B: left behind C: left off D: left out ...

(单选题)7: Each term our professors would____a list of books for us to read. A: hand in B: give away C: pass out D: write out ...

(单选题)1: Night classes are _____. A: a good idea B: good ideas C: good idea D: the good idea ...