_____, he cannot solve the word puzzle.
| A．Hard although he tried |
| B．He tried hard although |
| C．However hard he tried |
| D．As he tried hard |
_________ development of nuclear weapons is _________ threat to mankind.
| A．The; a | B．The; the | C．A; a | D．A; the |
— May I use your new dictionary? I want to look up a word．
— It’s over there. ________.
| A．No problem | B．Got it | C．Feel free | D．It depends |
Last year I applied to Princeton University. I ________ they would say yes — but they did, and now here I am．
| A．never think | B．am never thinking |
| C．have never thought | D．never thought |
I shall never forget the days ________ I spent in Beijing University, ________ has a great effect on my life.
| A．that; which | B．which; that | C．when; that | D．when; which |
Jane _________ under the pressure of work and she had to stay in hospital for a month.
| A．broke up | B．broke down | C．broke out | D．broke away |