________ the difficult maths problem, I have consulted Professor Russell several times.
A. Working out B. Worked out
C. To work out D. Work out
The lecture ________, a lively question-and-answer session followed.
A. being given B. having given
C. to be given D. having been given
For those with family members far away, the personal computer and the phone are important in staying________.
A. connected B. connecting
C. to connect D. to be connected
— I hope to take the computer course.
— Good idea. ____ more about it, visit this website.
A. To find out B. Finding out
C. To be finding out D. Having found out
He is thought ___foolishly .Now he has no one but himself to blame for losing the job.
A. to act B. to have acted
C. acting D. having acted
When it comes to __ in public, no one can match him.
A. speak B. speaking
C. being spoken D. be spoken