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

A．devotion

B．principle

C．identity

D．guidance

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

A．When

B．Because

C．Since

D．While

The train CRH380A, _______ trial operation on the Shanghai-Hangzhou high-speed railway, set a speed record of 416．6 kilometers per hour．

A．started

B．to start

C．starting

D．being started

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

A．where

B．which

C．that

D．when

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

A．laid

B．laying

C．to lay

D．being laid

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

A．an, a

B．a, the

C．the, a

D．a, a

Many people agree that there has never been a more splendid opening ceremony than _______ of the Guangzhou Asian Games in history．

A．one

B．that

C．which

D．this

Unless ________ to speak, you should remain silent at the conference．

A．invited

B．inviting

C．being invited

D．having invited

Growing around the lake ________ wild flowers of different colors．

A．is

B．are

C．has

D．have

Don't disturb me．I ________ letters all morning and ________ ten so far．

A．write; wrote

B．am writing; have written

C．was writing; wrote

D．have been writing; have written