she's taking a stick with her in case she-any trouble on the

she's taking a stick with her in case she_any trouble on the way.A has B will have C is to have D would havewe could hear him walking about upstairs_his heavy boots.A in B on C at D bythe husband gave his wife_every month in order to please herA half his income B his half income C half his of income D his half of incomethere are a dozen doctors working in the operating room,_needed for a typical brain operation.A twice of the number B twice the number C twice as the number D twice a number of选什么?为什么?感觉英语零碎的东西好多啊!怎么记都记不完!总会遇到新的,怎么办?