British scientists have produced _________ they believe is the world's smallest Christmas card．

which

who

that

what

The big fire in Shanghai, believed to _________ due to the burning of construction materials, caused 58 deaths and destroyed all the belongings of the people there．

have occurred

occur

have been occurring

be occurring

A teacher's _________ to education is worth great respect of the whole society because it brings benefits to the development of society．

devotion

principle

identity

guidance

_________ more and more people may refer to the Internet for the latest news, it is unlikely that the newspaper will disappear．

When

Because

Since

While

The train CRH380A, _________ trial operation on the Shanghai-Hangzhou high-speed railway, set a speed record of 416.6 kilometers per hour．

started

to start

starting

being started

We went to the Slender West Lake yesterday, _________, not surprisingly, was crowded with visitors from all over the world．

where

which

that

when

The dining room is clean and tidy, with a table already _________ for a big meal．

laid

laying

to lay

being laid

It is really _________ useful dictionary, _________ dictionary every one of us needs．

an, a

a, the

the, a

a, a

Many people agree that there has never been a more splendid opening ceremony than

_________ of the Guangzhou Asian Games in history．

one

that

which

this

When we reached the stadium in a rush, the newly-elected major _________ his speech and the performance _________．

have finished; began

had just finished; was about to begin

had just finished; had begun

just finished; began