Jogging every morning is________good habit.Stick to it，and you’ll make________great progress.
| A．a；/ | B．a；a |
| C．the；a | D．/；/ |
If the American government the expert’s suggestion, the world economy would not be in such a mess now.
| A．followed | B．follows |
| C．should follow | D．had followed |
He had hardly reached home _______ an unexpected guest came to visit him.
| A．then | B．when | C．the moment | D．than |
Had they known what was coming next, they ___________ second thoughts.
| A．may have | B．could have | C．must have had | D．might have had |
I don’t know how it ___________ that our car was bumped from behind.
| A．let out | B．gave out | C．got about | D．came about |
—How do you like your trip to Hainan?
—________,I enjoyed it very much，although the weather was hot sometimes.
| A．In addition | B．On the whole |
| C．In other words | D．On the other hand |