No effective（）has been found for this fatal disease which claims thousands of lives each year.

单项选择题That's really typical（）John. He says he'll come but he never turns up.

A.for
B.of
C.to
D.with

单项选择题In Britain people（）four million tons of potatoes every year.

A.consume
B.swallow
C.exhaust
D.dispose

单项选择题This machine works very well so long as no one（）with it.

A.interferes
B.disturbs
C.upsets
D.interrupts

单项选择题During the war she always kept a（）of tinned food in the house.

A.load
B.substitute
C.conservation
D.reserve

单项选择题The ratio of the work done by the machine（）the work done on it is called the efficiency of the machine.

A.against
B.with
C.to
D.for

单项选择题His inability to learn foreign languages was a(n（）to his career.

A.objection
B.defect
C.obstacle
D.depression

单项选择题In general , the amount that a student spends for housing should be held to one-fifth the total（）for living expenses.

A.acceptable
B.available
C.advisable
D.applicable

单项选择题When you go to the doctor he asks you to describe your（）so that he can make a diagnosis (诊断).

A.indications
B.signs
C.symbols
D.symptoms

单项选择题He ran so fast that he was out of（）

A.air
B.oxygen
C.breath
D.wind

单项选择题Be careful with those fireworks; they are（）to go off unexpectedly.

A.easy
B.probable
C.available
D.liable