After several years, he changed a lot and looked different from _______he used to be.
| A．whom | B．what | C．which | D．that |
_____ crying sadly, he raised his head and let tears stream down his face on purpose.
| A．To be seen | B．Seeing | C．To see | D．Having seen |
---Who will address the students from our school this evening?
--- ______ to be the speaker.
| A．I am supposed | B．I will suppose |
| C．I have supposed | D．I was supposing |
Tommy had had a three-mile drive north _____ he could turn and head back south.
| A．while | B．as | C．before | D．after |
The scientists all agreed that rules of physics, ______ we are all familiar, govern the world.
| A．to which | B．on which | C．which | D．with which |
To keep safe _______ an earthquake, you should remain at a spot in your room where nothing may fall on you.
| A．in search of | B．in advance of | C．in terms of | D．in case of |