16.After the clock twelve, the students walked out of the lecture room.
The traffic problems we are looking forward to seeing _____ have attracted the government's attention.
You should explore your talents so us to find out ______ your real interests lie.
Students taking the course _____to finish their homework with the help of computers.
______ colorful charts and graphs, he loaded a new software to help him.
Just hang the towel ______ the back of the chair so that it will dry soon.