Most of the machines in the workshop______ next month.A．are repairedB．have been repairedC．

One machine can do as much work as ______.A．40% of the peopleB．4% of the people in the wor

After ______ Himalayas, I think ______ Andes are the highest chain of mountains in the wor

What is the function of the modern windows？A．Allow fresh air to blow in.B．Keep out the wor

Which of the following is NOT mentioned as the function of an organ kept in the new machin

Most of the butterflies perish in the firs

Television has changed the lifestyle. of people in every industrialized country in the wor