有2道英语题不确定,如果你会,帮下忙了

有2道英语题不确定,如果你会,帮下忙了
2.Is it ___in china?
A:make B:making C:made D:makes
3.My good friend Mike wants to be a soldier when he grows up.So___I
A:do B:am C:will D:should
4.You cannot cross the street until the light____(turn)green.
5.The children often go____(swim)in the river summer.
1.____he was out of the room,he turned back and knocked at the teacher`s door again.
A:Before B:Since C:As soon as D:Until
请有把握的回答，搞得我都不知道哪个对了！