(2013·青岛一模)Scientists are still wondering ________ the Egyptians built the pyramids so long ago.

(2013·衡水一模) The question ________ you should take this medicine should be decided by your family doctor. (2013·河北石家庄一模)下列各句中，没有语病的一项是(　　)(3分) (2013·江西南昌一模)It hasn’t been made clear ________ the new underground line is to be open to traffic (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. (2013·齐鲁名校一模)To make the most of your time, live every moment as if it________ your last. 青岛之花是青岛独一无二的（）。 (2013·江西南昌一模)Why ________ it get colder when we climb up a mountain? We are getting nearer to the sun! (2013·开封高三第一次模考)It is announced that big prizes will go to ________ finishes the assignment on time (2013·东北三校一模)________ his career as an actor he never gave up his hope of becoming a Hollywood star (2013·滨州市一模) ________ contents, Mo Yan frequently writes about his own hometown, Gaomi, Shandong Province 2013年7月，青岛海域遭受了浒苔的侵袭，它的形成主要是由于（　　）。 (2013·江西鹰潭一中高三一模)What a pity! Considering his ability and experience, he ________ better. (2013·咸阳二模)The murderer, together with his two brothers, ________ sentenced to death just now (2013·银川高三二模)It remains to be seen ________ this plan is practical enough to keep the project going (2013·东北四市一模)After visiting Harbin, most of the foreign friends said they would never forget the time ________ they had spent. (2013·江西九校一模)A lot of lovers chose to get married on Dec. 12, 2012, ________ the date, the month and the year match. (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 (2013·四川南充市一模)My favorite writer is Mo Yan, some of ________ novels have a surprising ending. (2013·安徽重点中学一模)Not only ________ to turn off the lights in the kitchen, but we also failed to lock the front door. (2013·日照一模)—What has made John look like lacking sleep?—________ he had to prepare for the coming exam and stayed up last night