—It’s reported that the new underground line has been completed．
—Yes but it hasn’t been made clear _____it’s to be opened to traffic．
| A．that | B．who | C．what | D．when |
He came all the way to China for learning it better _______ for making money.
| A．other than | B．more than | C．better than | D．rather than |
Evidence gained from observation and experiment is often used to _______ a scientific theory.
| A．concern | B．confirm | C．consult | D．combine |
_______ be sent to work there?
| A．Do you suggest who should | B．Who do you suggest that should |
| C．Who do you suggest | D．Do you suggest whom should |
—That must have been a long trip.
—Yeah, it _____ us a whole week to get there.
| A．takes | B．has taken | C．took | D．was taking |
Between the two parts of the concert is an interval, _____ the audience can buy ice-cream.
| A．when | B．where | C．that | D．which |