Walmart, which is one of the largest American supermarket chains,
I wonder whether the police ______ that lost child or not
| A．have found | B．has been found | C．have been found | D．has found |
Jerry, why ______ you leave your things on the floor like this?
| A．would | B．need | C．must | D．may |
. When Jack reached the station the train ______ for ten minutes.
| A．had gone | B．had set off | C．had been away | D．had left |
After ______ seemed a long time, Mr. Li stood up and broke the silence.
| A．what | B．that | C．it | D．which |
Allow others the space to voice their opinions, ______ they are different from yours.
| A．as though | B．as if | C．unless | D．even though |