Choosing the right dictionary depends on you want to use it for．
| A．what | B．why | C．how | D．whether |
. It is Tom rather than his classmates that _________ to blame for what has happened.
A. areB isC. were D. was
---Jack was late for Mr. Smith’s oral class this morning.
---______? As far as I know, he never came late to class.
| A．How come | B．So what | C．Why not | D．What for |
To everyone’s surprise, Michael claimed _____ all his homework in just one hour.
| A．having finished | B．to have finished | C．that finished | D．finishing |
______ both sides accept these terms will everlasting peace be established in this region.
| A．Unless | B．As long as | C．If only | D．Only if |
I could feel my heart beating violently ______ I went on the stage to sing a song.
| A．for the first time | B．by the time | C．every time | D．from time to time |