怎么写啊14.－I want to be a computer manager.－________.I am study

怎么写啊
14.－I want to be a computer manager.
－________.I am studying computer science very hard.
A.So am I B.So I am C.So I do D.So do I
15.－I think teenagers should not be allowed to get car licenses.
－I agree.They are not _______.
A.serious enough B.something serious C.nothing serious D.enough serious
16.Tom,your hair is too long.Would you please get your hair _______.
A.be cut B.to cut C.cut D.cutting
17.Do you think _________ should be allowed to drive?
A.sixteen-year-old B.seventeen-year-olds C.fifteen-year-old D.eighteen-years-olds
18.At last,Tom made the baby ________ and began to laugh.
A.stop to cry B.stop crying C.to stop to cry D.to stop crying
19.Students must be strict _________ their studies and teachers should be strict ________ their students.
A.in ; at B.at; with C.with ; in D.in ; with
20.John likes collecting stamps.____________.
A.So does Tom B.Also does Tom C.Tom likes so C.So Tom does