2019高考二轮复习英语考案: 介词和连词

XX高考二轮复习英语考案: 介词和连词
【专题考案】1. the teacher is writing ____ a piece of chalk on the blackboard while the students are writing ____ink in exercise books.  
a. with, in        b. in, with        c. in, in        d. with, with
2. the worker can make chairs ____ wood, and also can make paper ____ wood.
a. from, of       b. of, from       c. of. of          d. from, from
3. mary dropped in ____ mr smith, but he  wasn' t at home, so she went to drop in ____ mr smith's office.  
a. on, on         b. at, at