On hearing the humorous story, they __________.
| A．burst into crying | B．burst into laughter | C．burst into laugh | D．burst out crying |
Our country should set up more national parks animals can live freely.
| A．when | B．which | C．where | D．whose |
— Can the project be finished as planned?
— Sure. it completed in time, we’ll work two more hours a day.
| A．Get | B．To get | C．Getting | D．Got |
Don’t litter in the street in Singapore, you could be arrested.
| A．or | B．and | C．but | D．so |
In the past several weeks, many cities in Northern China from heavy fogs and severe cold.
| A．had suffered | B．have been suffering | C．were suffered | D．suffered |
she was out of the room, he took a quick look at the papers on her desk.
| A．If | B．While | C．Though | D．Unless |