He ______ have sent the e-mail at an earlier time， but there was something wrong with the network.
| A．must | B．should |
| C．could | D．might |
Published in 1974，the book was a(n) ________ success and was soon translated into thirteen foreign languages.
| A．constant | B．instant | C．unique | D．accurate |
----Has your uncle come back from England for a summer holiday?
----Yes. But he _________ at home for only a few days. Now he has been back to London.
| A．stayed | B．has stayed | C．had stayed | D．is staying |
________ going to the program If You Are the One, she knew she had to be there or her mother would be unhappy.
| A．Although much she disliked | B．Much although she disliked |
| C．As she disliked much | D．Much as she disliked |
Under the environment of fierce competition, the only way John could imagine _______ stress was to get tougher by making greater efforts.
| A．handling | B．to handle | C．handled | D．having handled |
Living in _______ ever increasingly fast-paced world, we are facing greater competition, so we must take ________ advantage of every opportunity to develop.
| A．an; the | B．an; / | C．the; an | D．the; / |