Find out the correct answer.

12 - you ------ bring food or drink into the computer room at any time! please eat and drink in the cafeteria only. 1 - mustn't 2 - havn't got to 3 - must to 4 - have to 13 - We ----- invest in high-tech projects. Fewer than three percent of the companies we invest in are electronics companies. 1 - hardly ever 2 - usually 3 - always 4 - never 14 - Doctor Wallace, -------- how often I should take this medicine? 1 - you could tell me 2 - could you tell me 3 - tell me 4 - would tell me