The price system is a complex network composed of the prices of all the products bought and sold in the economy as well as ________ of a great number of services．

the one

that

ones

those

I ________ tell you with certainty that he won't be able to finish it before the deadline．

will

must

can

may

His humorous closing speech was a welcome addition to the ________ dull meeting．

therefore

meanwhile

otherwise

nevertheless

Someone ________ his car in front of my house and it is blocking my driveway．

had parked

was parking

parked

has parked

Many people can't learn any lessons from the mistakes they've made ________ they get hurt somehow．

whether

unless

if

as

The performance will be given next week．You can go to the student union ________ tickets．

for

with

by

on

With the development of agriculture, the people ________ village I taught are now living a happy life．

in whose

whose

in which

which

During the 2008 financial crisis, the French president Nicolas Sarkozy agreed to provide millions of emergency fund aid to help ________ unemployment．

release

resemble

relieve

recommend

Misunderstandings ________ from lack of social communication, unless ________ properly, may lead to serious problems．

arisen; handling

arising; handled

rising; handled

risen; handling

The driver could have survived but he ________ the seat belt．

had been wearing

hadn't worn

wasn't wearing

didn't wear