—Have you known Dr. Jackson for a long time?
—Yes，since she ________ the Chinese Society.
A．has joined B．joins
C．had joined D. joined
Progress ________ so far very good and we are sure that the work will be finished on time.
A．was B．had been C．has been D．will be
—Why don't you go home?
—Because a lot of work________yet.
A．hasn't finished B．hasn't been finished
C．has been finished D．haven't finished
I'll return the book to the library as soon as I________it.
A．will finish B．am going to finish
C．finished D．have finished
This is the best dinner that I________.
A．enjoyed B．have enjoyed
C．had enjoyed D．enjoy
—Isn't it hard to drive downtown to work?
—Yes，that's why I________to work by train.
A．have been going B．have gone
C．was going D．will have gone
