(单选题)13: 一日三餐中，两餐之间的间隔时间最好为（ ）小时。 A: 2～3 B: 3～4 C: 5～6 D: 6～8 E: 8～10 ...

(单选题)7: 在动物的肝脏、鱼肝油、蛋黄、黄油等食物中，下列哪种维生素的含量较高？（ ） A: B族维生素 B: 维生素A C: 维生素D D: 维生素C E: 维生素E ...

(单选题)1: 中国居民平衡膳食宝塔由几层组成？（ ） A: 3层 B: 4层 C: 5层 D: 6层 ...

(单选题)45: —Is that the small town you often refer to? —Right, just the one you know ___I used to work for years. A: that B: which C: where D: what ...

(单选题)39: Mary never does any reading in the evening, ___. A: so does John B: John does too C: John doesn't too D: nor does John ...

(单选题)33: My grandma still treats me like a child. She can't imagine___ grown up. A: my B: mine C: myself D: me ...

(单选题)27: John plays basketball well, ___his favorite sport is badminton. A: so B: or C: yet D: for ...

(单选题)21: Why not___Professor Li for help? He is kind-hearted and willing to help. A: ask B: you ask C: to ask D: your asking ...

(单选题)15: While shopping, the customer pushes his card into a slot beside _____ items are wanted and pushes a button or two. A: those B: whose C: where D: whichever ...

(单选题)9: There was a loud scream from the backstage immediately after the concert ended, ___ ? A: wasn't there B: was there C: didn't it D: did it ...