A元素原子L层比B元素L层少2电子，B元素核外电子数比A元素多5个，则A、B 可形成
A．AB B．A2B C．A2B3 D．B2A3
答案：D
根据各小题Ａ句的意思完成Ｂ句，使两句的意思基本相同。每空限填一个单词。
小题1:A: His friend didn't know what he should do.
B: His friend didn't know do.
小题2:A: What was wrong with the old man？
B: What the old man？
小题3:A: He found it was not easy to sleep.
B: He found to sleep.
小题4:A: He went to bed at twelve last night.
B: He go to bed twelve last night
小题5:A: She was worried and her friend was worried, too.
B: She was worried and her friend.
小题6:A: She always makes me happier when I’m unhappy.
B: She always me when I’m unhappy.
目前系统决定额度的动用是（）
A、账户放款
B、账户审核
C、账户放款或审核
D、以上都不正确
