In my opinion，his suggestion__________right or not，should be considered.
| A．if | B．which | C．when | D．whether |
________ you’ve heard the song, you’ll never forget it.
| A．At once | B．Once more |
| C．Once upon a time | D．Once |
The mother asked the boy ________ football in the street. It was dangerous.
| A．to play | B．playing |
| C．not to play | D．not playing |
—I’m going to the States.
—How long ________ you ________ there?
| A．were; stayed | B．are; staying |
| C．have; stayed | D．did; stay |
Can we ________ the internet when we study?
| A．make use of | B．make fun of |
| C．make room for | D．make a decision for |
The country has ________ too many wars in the past ten years.
| A．gone all out | B．gone through |
| C．gone in for | D．gone over |