单项选择题

(Only then) he (became) aware of (the fact) that there were more difficulties ahead (than) he had expected.

A．Only then
B．became
C．the fact
D．than
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单项选择题
(Later on), children (attempt to) make their paintings (look as closely) as possible (to the real things) they are representing.
A．Later on
B．attempt to
C．look as closely
D．to the real things
单项选择题
For visitors (whose) time is limited (and are unable) to learn the history and examine the building in detail (on) the spot, it is suggested that the following plan of a journey (be followed).
A．whose
B．and are unable
C．on
D．be followed
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