He devoted most of his time to his research, believing his hard work would___sooner or later.
| A．put off | B．take off | C．come off | D．pay off |
We have just heard a warning on the radio _____________ a typhoon may be on its way．
| A．what | B．when | C．which | D．that |
I will spend half of my holiday practicing English and _____________ half learning drawing．
| A．another | B．the other | C．other’s | D．other |
I ______________ have passed my examination easily，but I made too many stupid mistakes．
| A．must | B．will | C．shall | D．could |
Mom，don’t you think it's OK to play once in a while ____________ it doesn’t affect my studies?
| A．even if | B．unless | C．so that | D．as long as |
— Is everyone here?
— Not yet．Look，there ______________ the rest of our guests!
| A．come | B．comes | C．is coming | D．are coming |