His failure in the exam suggested that he ______ the teacher’s instructions.
A. can’t have followed B needn’t have followed
C mustn’t have followed D. shouldn’t have followed
____ red is a symbol of warmth, it can sometimes make people feel uneasy or even frightened.
| A．As | B．Since | C．If | D．While |
This is the second time that the top 10 list of popular novels _____ published by this magazine.
| A．has been | B．are | C．is | D．have been |
---Do you still smoke heavily?
--- No. In fact, it is two years since I ____.
A. have stopped smoking B. smoked
D. began to smoke D. started to smoke
--- Is your new team-mate a good guy?
--- Yes. He is kind, skillful, hard-working and intelligent; ____, I can’t speak too highly of him.
| A．on the contrary | B．by the way | C．in a word | D．as a result |
Having never met with such a _____ problem, he felt _____ and didn’t know how to solve it.
| A．puzzling; puzzled | B．puzzled; puzzling |
| C．puzzling; puzzling | D．puzzled; puzzled |