It is better to ____ the lights before you leave here.
| A．put out | B．put off | C．put on | D．put up |
—Do you know _______ the Capital Museum?
—Next Friday.
| A．when will they visit | B．when they will visit |
| C．when did they visit | D．when they visited |
Granny often tells us _______ water in our daily life.
| A．save | B．saving |
| C．to save | D．saves |
—What _______ the number of the students in your school?
—About two thousand. A number of them _______ from the countryside.
| A．is; ,are | B．is; is |
| C．are; is | D．are; are |
Hurry up! Once the concert starts, nobody _______ to enter the concert hall.
| A．allows | B．allowed |
| C．is allowed | D．is allowing |
Your dream will come true _______ you put your heart and into it.
| A．if | B．unless |
| C．although | D．So |