Frank put the medicine in a top drawer to make sure it would not be ________ to the kids．

accessible

relative

acceptable

sensitive

You'd sound a lot more polite if you make a request ________ a question．

in search of

in the form of

in need of

in the direction of

Many of the earth's plants and animals have already ________ and several other species are endangered．

died away

died out

died down

died of

We should always keep in mind that accidents ________ from carelessness while driving．

arise

arouse

begin

rise

The graduates ________ into the company usually receive strict training before they start to work．

accepted

admitted

entered

received

It was already past midnight and only three young men ________ in the tea house．

left

remained

delayed

deserted

Yesterday morning in a city in the USA, a crowd of dustmen went on a strike to ________ complaints about their low pay．

sound

voice

noise

talk

Whenever it is, it is right for a student to ________ the school disciplines．

see

watch

notice

observe

He tried to cope with the ever-increasing burden of his work, but finally he ________ and had to take a complete rest．

broke in

broke down

broke out

broke up

The police tried to get some clues from the suspect, but he remained ________．

silent

quiet

calm

still