.
. All books ___________ to the library more than three days late will be subject to a fine.
| A．return | B．returning | C．to return | D．returned |
--- Who are the teenagers gathering at the school gate?
--- Well, if you _____ know, they are all my visiting students.
| A．need | B．must | C．may | D．will |
Nothing taught by others can have the same effect on you as _____ learned by yourself.
| A．that | B．what | C．which | D．it |
In China, _______ bicycle is ______ popular means of transportation.
| A．the; a | B．a; / | C．the; the | D．a; the |
-- What do you think of the furniture on exhibition?
--- Well, great! But I don’t think much of _______ you bought.
| A．the one | B．it | C．that | D．which |
The best job is _______ which uses your skills in doing something together with your interest in the subject.
| A．something | B．the one | C．one | D．it |