Viết câu hoàn chỉnh

1.carry/very heavy./because they are/Dinsise can't/the boxes
2.has/He/in/his room./no toys
3.a big cake/birthday./our teacher's/We are preparing/for
4.evening?/tomorrow/she/going to do/What is
5.the USA./teacher/from/an English/John is
6.for/is dangerous/children./Camping alone/small
7.does/come from?/Where/pollution
8.bookstore?/behind/or next to/Is the restaurant/the childen's
9.is/in/the capital/of the country./The biggest factory
10.Opening/to 4 p.m/hours/10 a.m /are