101.Bill is always complaining of poor digestion. I am afraid that there _____ something wrong with his stomach. (A) must be (B) shall be (C) must have been (D) might have been

103.On the way to ROC Military Academy, across the street of the Gateway of the Academy, you can see the “Camaraderie” Wall _____ with Chinese characters, “親愛精誠”, meaning a feeling of friendship and trust among people who spend a lot of time together. (A) carving (B) which carve (C) carved (D) which caved