30. It is a good city for cycling because it is flat and ________is convenient for bikes.
| A．however | B．what’s more | C．therefore | D．Besides |
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 |
It is no______arguing with Bill because he will never change his mind。
| A．use | B．help | C．time | D．way |
Her question was so difficult that I could hardly make any ____ of it at all.
| A．explanation | B．meaning | C．sense | D．idea |
--- Have you thought of the topic for the composition?
---Not yet, I _______ it very carefully, but I haven’t decided.
| A．will consider | B．have been considering |
| C．had considered | D．was considering |
With the weather getting colder, visitors from Australia spent their _____ days in
Beijing.
| A．a few last | B．last few | C．few last | D．last a few |