There are a lot of computers in the lab, and they need professional ________ to make sure they can be in a good state．

operation

maintenance

service

advice

Everyone should keep on getting himself educated so as to be ________ modern technology．

good at

successful in

up to date with

interested in

Selecting a mobile phone is no easy task because technology ________ so rapidly．

is changing

has changed

will have changed

will change

After the meeting, the leaders had a ________ discussion about it．

far

farther

further

farthest

One way to understand thousands of new words is to gain ________ good knowledge of basic word formation．

/

the

a

one

_________ in convenient locations, chain stores are usually next door to people’s homes and close to the bus stops or underground stations．

Opening

Having opened

Being opened

Opened

The reading room is _________ the classroom．

two times as big as

twice bigger as

twice as big than

twice as big as

Nearly a month had gone by _________ she showed some sign of giving in to his demand．

until

before

since

after

Mary was very angry, for her classmates all went skating _________ her．

except

but

besides

without

If you _________ your promise, the results will be sure to satisfy you．

carry out

carry on

keep on

keep out