The girl seldom, if _____, turned to her brother for protection.
| A．never | B．ever | C．always | D．then |
The pilot, whether ______ or design, made the plane do a sharp turn.
| A．by accident | B．at times | C．suddenly | D．all at once |
If you ______ go, at least wait until the rain stops.
| A．can | B．must | C．should | D．would |
The reason for his success is ______ he worked very hard.
| A．why | B．that | C．whether | D．how |
He couldn’t ______ the fact that the money was found in his house.
| A．answer for | B．leave for | C．account for | D．care for |
.Allow children the space to voice their opinions,____ they are different from your own.
| A．until | B．even if | C．unless | D．as though |