Finding information in today’s world is easy．The_______is how you can tell if the information you get is useful or not。
| A．ability | B．eompetition | C．challenge | D．knowledge |
---Who is making so much noise in the garden?
---______ the children.
| A．They are | B．There are | C．It is | D．Those are |
Historically, ______ main material for making tables has been wood, but ______ metal and stone have also been used.
| A．the; / | B．/; / | C．the; the | D．/; the |
While in London, we paid a visit to the hospital founded__________the nurse Florence Nightingale.
| A．in need of | B．in favor of | C．in honor of | D．in place of |
He has been in high spirits, for pieces of exciting news came to him __________.
| A．one after another | B．one by one | C．little by little | D．step by step |
He arrived home very late last night, __________in the early hours this morning.
| A．or else | B．or rather | C．rather than | D．more than |