It isn't cold enough for there _____ a frost tonight, so I can leave Lim's bike out safely.
| A．would be | B．being | C．was | D．to be |
--- I want to know whether the day I am looking forward to will come today or tomorrow.
--- Does that make any difference?
| A．when | B．why | C．that | D．on which |
We were looking for you all this morning. Youoffice without a word.
| A．mustn’t have left | B．shouldn’t have left | C．couldn’t have left | D．needn’t have left |
Shanghai and Nanjing are among the most important cities in China _____ their size and population.
| A．in favor of | B．in case of | C．in honor of | D．in terms of |
— What did your parents think about your decision?
— They always let me do _______I think I should.
| A．when | B．that | C．how | D．what |
-- Have you been to the Great Wall?
-- Perhaps not in my memory. _______, it might have been during my early childhood.
| A．If any | B．If ever | C．If once | D．If not |