There is no simple answer, _____ is often the case in science.
| A．as | B．that | C．when | D．where |
—Are you going to Dalian by air?
—No, the tickets are ____expensive for me.
| A．very much | B．so much | C．far too | D．too much |
He will have learned English for eight years by the time he _____ from the university next year.
| A．will graduate | B．will have graduated | C．graduates | D．is to graduate |
—Could you spare me one minute, Bob? I have a favor to ask you.
—_____.
| A．It’s a pleasure | B．Go ahead | C．Help yourself | D．Ask, please |
The world was deeply ________ with the Green Olympics held in China in 2008.
| A．encouraged | B．offered | C．impressed | D．covered |
The students were ________ over the ________ problem，listening to the teacher with a ________ expression on their faces.
| A．puzzled；puzzling；puzzling | B．puzzled；puzzling；puzzled |
| C．puzzling；puzzling；puzzled | D．puzzling；puzzled；puzzling |