1.they were cleaning the room when I arrived
2.they must dry the beans in the sun
3.the foreman is showing the students around the factory
4.A Chinese official made paper from wood pulp in the year 105
5.people say the computer is one of the most important inventors
6.we haven't finished our homework yet
7.they will make the next meeting in Chicago
8.when did Lewis waterman invent the fountain pen
9.somebody clean the room everyday
10.john will collect me at the airport
11.your teacher must sign this form
12. will you invite her to your birtday party
13.we can't wear jeans at work
1.The room was being cleaned when l arrived.
2.The beans must be dried in the sun.
3.The students are being showed around the factory by the foreman.
4.Paper was made from wood pulp by a Chinese official in the year 105.
5.People say One of the most important inventors are by the computer.
6.Our homework hasn't been finished yet.
7.The next meeting will be made in Chicago.
8.When were the fountain pen invented by Lewwis waterman?
9.The room is cleaned every day.
10.l will be collected in the airport by John.
11.This form must be signed by your teacher.
12.Will she be invited to your birthday party?
13.Jeans can't be wore at work.
