We have done things we ought not to have done and ________ undone things we ought to have done.
| A．left | B．leaving | C．will leave | D．to leave |
____is well known, Taiwan is part of China.
| A．As | B．That | C．Which | D．It |
----You haven’t been to Beijing, have you?
----_____. How I wish to go there!
| A．Yes, I have | B．Yes, I haven’t | C．No,I have | D．No,I haven’t |
____the morning of the second day of the meeting, Dr. Smith read his paper.
| A．At | B．In | C．On | D．From |
The wider China opens its door to the outside world, the more people find _____important and necessary to study foreign languages.
| A．is | B．them | C．it | D．more |
Not only Dick but also Jack and I_____interested in Chinese folk songs
| A．am | B．is | C．have | D．are |