单项选择题

Researchers find that when a person tells lies ______

A．his blood pressure increases measurably
B．he looks very serious
C．he tends to make some small changes in his behavior
D．he uses his unconscious mind

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单项选择题

Shall we walk through the park No, it's too late ______ there.

A．that we walk
B．for us walking
C．us to walk
D．for us to walk

单项选择题

Which of the following has most probably been discussed in' the former paragraph of this passage

A．it is extremely important to develop tourism.
B．Building roads and hotels is essential
C．Support facilities are highly necessary
D．Planning is of great importance to tourism