—How long has John been here?
— Two years, _______ he still has no friends.
| A．and | B．so | C．but | D．or |
You should report the accident,___
| A．however serious or minor it is |
| B．how serious or minor it is |
| C．it is how serious or minor |
| D．it is however serious or minor |
You can phone the doctor;___,I doubt whether he will come out on a Saturday night
| A．however |
| B．therefore |
| C．otherwise |
| D．but |
—If we take a plane,we’ll of course have arrived in Paris by the next weekend.
—Don’t be sure.We should___the weather factor.What shall we do if it is foggy？
| A．leave alone |
| B．allow for |
| C．look over |
| D．take advantage of |
Mary wanted to travel around the world all by herself,but her parents did not___her to do so
| A．forbid |
| B．allow |
| C．follow |
| D．ask |
It was___Jenny’s timely help that we accomplished the task on time
| A．in addition to |
| B．according to |
| C．owing to |
| D．in relation to |