I wonder what has happened to Annie, Shehave been here by now.

单项选择题—I cant work out this problem.—. Lets ask the teacher.

单项选择题In China as well as many other countries around the world，greathave been made to reduce the amount of carbon emission.

单项选择题With an examination，the students felt relaxed and enjoyed themselves the whole night.

单项选择题—he managed to get the information—Oh, a friend of his helped him.

单项选择题—Which of the two ties would you like to wear—.You know Im not particular about ties.