31．On the opposite board ________ one map of China ________ all kinds of greeting words for the 2011 National Day．

A．hang; for

B．hangs; and

C．hang; with

D．hangs; as well as

30．Later, as we had expected, the meeting was held at ________ Hilton Hotel．

A．where it calls

B．what is called

C．which is called

D．that calls

29．Chinese have made one success after another in every field, ________ of great importance to the world．

A．which I think is

B．what I think it is

C．and I think that

D．that I think it is

28．________ of the truth of the reports, Bill told his colleagues about it．

A．Convincing

B．Convinced

C．To convince

D．Having convinced

27．According to the school rules, no student ________ leave their dormitory after eleven o'clock at night without their teacher's permission．

A．will

B．shall

C．may

D．must

22．The workers had read the operation ________ before they began to test the machines．

A．explanations

B．instructions

C．descriptions

D．introductions

21．It's likely that ________ 12∶30 flight will be canceled because of ________ bad weather．

A．the; a

B．a; 不填

C．a; the

D．the; 不填

Many of the road signs and advertising billboards are now in English, ________ Beijing more accessible to foreigners．

A．making

B．made

C．to make

D．having made

It was wrong to cut down the old tree which dates back to 1915, ________ the reason．

A．whatever

B．wherever

C．whenever

D．however

News shocked the world ________ a Russian jet carrying members of a local hockey team crashed．

A．which

B．what

C．that

D．where