He drove his car with __________ (小心，谨慎).
They made __________ (接触，联系) with headquarters by radio.
The terrorists are __________ (威胁) to blow up the airport.
The sofa can also __________ (起作用) as a bed.
We all dislike her for her imperious __________ (姿势).
She dragged up that incident just to __________ (使窘迫) me.
We __________ (假设) that the bodies obey Newton's Third Law.
The house has a very good __________ (位置，职位).
We need to suffer in order to __________ (表同情) with others who suffer.
I don't understand what his __________ (动机，目的) is.

__________ with foreign countries can bring us much information about the world.

I soon found that the work I was doing had already been done by someone else —__________ I was wasting time.

I was walking down the street, when I suddenly saw a car __________ a huge pine.

After staying in hospital for long, the patient was advised to go to the seaside to __________ his health.