In the U.S, ______a tip is thought to be polite when paying the bill.
| A．leave | B．having left | C．leaving | D．being left |
At first Bob was puzzled by Virginia s waving, but then it _____ his mind that she was trying to tell him something.
| A．crossed | B．passed | C．occurred | D．opened |
Jim isn't _____, but he did badly in the final exams last semester.
| A．gloomy | B．dull | C．awkward | D．tedious |
The manager said that they had an _____ plan if the plan they had submitted was not accepted.
| A．alternate | B．alternative | C．absolute | D．appreciable |
Because the children keep interrupting her whenever she reads a book, she is always _____ her place.
| A．loosing | B．missing | C．losing | D．looking for |
. As he had no friends and relatives in the town, the traveler tried to find a _____ somewhere.
| A．log | B．lodge | C．landing | D．lodging |