This is ___that they all want to but it.
| A．a so useful book | B．such an useful book | C．a such useful book | D．so useful a book |
If you had joined the chat room ten minutes ago, you ______what we were talking about!
| A．have known | B．knew | C．would have known | D．would know |
Yesterday, when I went to his office, he ______ online for some information. I think it will be an interesting lecture.
| A．searched | B．was searching | C．would search | D．has searched |
Instead of telling the joke he _______, Crystal made up a new one.
| A．made | B．has made | C．had made | D．would make |
I am pleased to have this chance today ______to you about the United Nations or the UN.
| A．talking | B．to talk | C．talked | D．talk |
—Howareyougettingonwithyourwork?
—Oh,I'msorry.Thingsaren'tgoingsowellas________.
| A．beingplaned | B．planning | C．planned | D．toplan |