Nobody knows how the accident _________．The police are investigating it．
| A．came out | B．came about |
| C．came in | D．came down |
It’s helpful to put children in a situation ____ they can see themselves differently.
| A．that | B．when | C．which | D．where |
Last weekend, I _____ my washing machine ______.
| A．had; repair | B．had; repairing | C．had; repaired | D．had; to repair |
The manager devotes all his spare time ______ the violin.
| A．to practise | B．to practicing |
| C．in practising | D．for practising |
______ he returns to his native land.
| A．It is long before since | B．It is before long that |
| C．It won’t be long before | D．It will be long after |
This book _____ ten units, ______ three mainly revision.
| A．contains; including | B．includes; containing |
| C．contains; containing | D．includes; including |