Advertising companies are always having to come up with new ways to ______ products.
| A．design | B．classify | C．promote | D．identify |
I _____ sooner but I didn’t know that they were waiting for me．
| A．had come | B．was coming | C．would come | D．would have come |
—What have you learned from your experience in Thailand?
—Well, meeting people from another culture ______ be very difficult．
| A．must | B．can | C．should | D．shall |
All her hard work ______ in the end, and she finally passed the exam．
| A．paid back | B．paid off | C．brought out | D．brought off |
—Did Hans take part in the contest?
—No, at the last moment his courage _____ him and he ran away．
| A．ignored | B．declined | C．failed | D．lost |
As many as 100 species of fish, some ____ to these waters, may have been affected by the pollution．
| A．relevant | B．immune | C．unique | D．convenient |