(2011年南通一模)________there are living creatures in the outer space as those on Earth hasn’t been proved until now.

A．How                     B．When

C．Where                   D．Whether

 (2011年浙江温州联考)The fact has worried many scientists________the earth is becoming warmer and warmer these years.

A．what                     B．which

C．that                       D．though

 (2010年湖北武汉联考)Faced with trouble or difficulty，a person takes________help that is available.

A．whatever                      B．whenever

C．wherever                      D．however

 (2010年宁夏银川调研)She is very dear to us.We have been prepared to do________it takes to save her life.

A．whichever                           B．however

C．whatever                             D．whoever

 (2011年四川绵阳模拟)Most of________we call geniuses(天才)are successful only because they have made extraordinary efforts.

A．whom                          B．who

C．which                          D．what

 (2011年潍坊质量监测)Sometimes advertisements make________possible for companies to sell the customers________money can not buy.

A．/；that                                B．it；what

C．that；which                        D．it；whose

 (2011年陕西西安分科质检)After working on the maths problem for hours，he found________he thought was the key to it.

A．what                            B．that

C．where                          D．which

 (2011年长沙模拟)The question has been raised at the meeting________each member country should equally share the expense of the committee.

A．that                       B．whether

C．if                          D．what

 (2011年烟台四校联考)________suddenly occurred to him that his parents should have arrived in Beijing by this time.

A．What                           B．It

C．That                            D．As

 (2011年山东潍坊质量抽样)Her books were all over the dining table，________meant we had to eat in the kitchen.

A．which                   B．what

C．that                       D．it