____ he had not hurt his leg, John would have won the race.
| A．If | B．Since | C．Though | D．When |
People who exercise _______________ are less likely to feel stress.
| A．regularly | B．formally | C．mostly | D．publicly |
Internet shopping is really _____________ when people are sure of its safety and security.
| A．taking off | B．taking up | C．setting off | D．setting up |
What the young man can’ t ___________ is that his mum always treats him like a baby.
| A．support | B．undertake | C．hold | D．bear |
____________ the news, so far, has been good, there may be bad days ahead.
| A．When | B．While | C．If | D．As |
Not until the train pulled into the next station ______________ her suitcase gone.
| A．Mary had found | B．had Mary found |
| C．did Mary find | D．Mary found |