183. --- You look pale, what troubled you?
--- I ______ my dead friend.
| A．am thinking about | B．was thinking about | C．had thought about | D．will think about |
Einstein’s Theory of Relativity is so________ that most of us can not understand it.
| A．controversial | B．appropriate | C．abstract | D．ridiculous |
Art is influenced by _____ customs and faith of ____ people
| A．the; a | B．不填; a | C．the; 不填 | D．the; the |
--- John failed his final exam.
-- I’m not surprised at the news at all. _______, he is never seen busy with his lessons.
| A．Above all | B．In all |
| C．First of all | D．After all |
Great changes ______ in my hometown in the last ten years.
| A．took place | B．have taken place |
| C．have been taken place | D．was taken place |
---I think Helen is at home.
---No, shebe at home, for she phoned me from the airport just five minutes ago.
| A．mustn't | B．needn't | C．can't | D．dared not |