As is well known, eating too much fat can（）heart disease and cause high blood pressure.

单项选择题If we（）early tomorrow morning, we will reach the coast before dark.

A．take off
B．set off
C．set up
D．take up

单项选择题The drowning boy made a （） attempt to catch the rope thrown to him.

A．dangerous
B．graceful
C．gentle
D．desperate