. He stood up, _______ the large door and looked outside. There on the ground lay a white dog.
| A．opens | B．opened | C．opening | D．having opened |
.
—Must I turn off the gas after cooking?
—Of course! You can never be__________careful with that.
| A．enough | B．too | C．so | D．very |
.
____________apple fell from the tree and hit him on_____________head.
| A．An; his | B．An; the | C．The; his | D．The; the |
.
A fire broke out in a commercial mall unexpectedly the customers and the persons working there fleeing for safety
| A．making | B．causing | C．forcing | D．sending |
.
To greatly raise people’s living conditions, _______.
| A．all kinds of measures have taken |
| B．they have taken all kinds of measures |
| C．it is said that they have taken all kinds of measures |
| D．I think they have taken all kinds of measures |
.
We _______ contact each other; she is _______ of an acquaintance than a friend.
| A．seldom; more | B．often; better | C．often; more | D．seldom; better |