_______ the manager came to Beijing on business, he would visit his old friends there.
Which do you enjoy _____ your weekend, swimming or fishing?
I was so familiar with her that I recognized her voice I picked up the phone.
There were two boys in the lab, did the experiment successfully.
—How wise of you to come round, but why?— that all is right.
—Mary told me she would computer studies. —Really? I’ll try my best to ask her to such foolish ideas.