(2013·安徽省芜湖三校一模)A recent study has found that the number of smokers ________ sharply over the past five years.
A．is increasing
B．are increasing
C．has been increasing
D．have been increasing
(2013·山东济宁一模)How close parents are to their children ________ a strong influence on the development of the children's characters.
A．having B．had
C．has D．have
(2013·安徽合肥三校一模)—Was it at 11 o'clock ________ your father came back last night?
—Yes, he is always coming back so late.
A．that B．while
C．when D．until
(2013·青岛一模)Scientists are still wondering ________ the Egyptians built the pyramids so long ago.
A．how it is that B．how is it that
C．it is how that D．that how it is
(2013·辽宁五校协作体第一次联考)________ about the man wearing sunglasses during night that he was determined to follow him.
A．So curious the detective was
B．So curious was the detective
C．How curious was the detective
D．How curious the detective was
(2013·东北三校一模)I am certain by no means ________ his word since he has promised an amount of money to the poor.
A．he will break B．will he break
C．broke D．did he break
