We must keep our room clean，for dirt and disease go________，you know.
| A．hand in hand | B．step by step |
| C．from time to time | D．one after another |
In buses, all of us _________ thieves.
| A．keep an eye out for | B．are keep an eye out for |
| C．are kept an out for | D．keep eye out for |
In the near future, China will increase supply of smaller houses, to help low-income families to buy houses of their own.
| A．aims | B．being aimed | C．aiming | D．having aimed |
All the parents in Mianyang admire Nanshan Middle School the teachers are treating their students like friends.
| A．why | B．where | C．that | D．which |
People in Nome all had diphtheria, a disease that spreads very fast. If ________, it would produce a powerful poison that would kill the patient.
| A．untreating | B．to untreat | C．untreated | D．untreat |
—Was the label ________your luggage?
— No,it wasn’t.
| A．attached to | B．attach to | C．attaching to | D．attached |