The consequences of our actions are unbelievably complicated and diverse _______ predicting the future is a very difficult business indeed.
| A．because | B．even if | C．in order that | D．so that |
Word came _______ the students would put off the outing until next week, when they wouldn’t be busy.
| A．that | B．when | C．which | D．whether |
He ______ at once when I promised to help him.
| A．cheered up | B．gave up | C．broke up | D．turned up |
After going into the concert hall, the mother _____ a friend and went over to greet him.
| A．searched | B．knew | C．spotted | D．realized |
According to the school rules, no student __________ go out of the school after eleven o’clock at night without the teacher’s permission.
| A．will | B．must | C．may | D．shall |
Going on a trip into space must be quiteexciting experience.
| A．/ ; the | B．the; the | C．the; an | D．/ ; an |