1.In bas-relief sculpture, a design projects very slightly from its background, _____ some coins.
(A) as on
(B) because
(C) the way that
(D) similarly.
2.With age, the mineral content of human bones decreases, _____ them more fragile.
(A) make
(B) and to make
(C) thereby making
(D) which it makes.
3.The first explorer _____ California by land was Jedediah Strong Smith, a trapper who crossed the southwestern deserts of the United States in 1826.
(A) that he reached
(B) reached
(C) to reach
(D) reaching it
三道题,分别选什么?为什么?