When it ________ air pollution, Beijing faces the three “C” s－cars，coal and construction，which lead to Beijing's thick air pollution．

refers to

comes to

happens to

speaks to

Don’t worry, you’ll get chosen for the team．________．

Every dog has its day．

An old dog cannot learn new tricks．

A bad beginning makes a bad ending．

A bad workman always blames his tools．

With so many people _________ by sending E-mails every day, it will become more and more important to have a good knowledge of the internet．

communicating

communicated

communicate

to communicate

Don’t be so disappointed, if you spare no efforts to study your chosen subjects, you will be successful _________．

on time

at times

at a time

in time

In my opinion, all Mr white _________ good to his students in his class at present．He is very strict in their study．

does, does, does

does did do

does, does do

did do does

Come and see me whenever _________．

you are convenient

you will be convenient

it is convenient to you

it will be convenient to you

The prize of the games, _________ in 776BC ,didn’t not include women players until 1912．

first playing

to be first played

first played

to be first playing

We hadn’t met for 20 years, but I recognized her _________ I saw her．

the moment

the moment when

for the moment

at the moment when

what he said at the meeting suggested that he _________ with us．

didn’t agree

shouldn’t agree

not agree

should agree

It is reported that the group of Eight _________ the eight richest countries in the world．

is consisted of

consists of

is made up

consists in