ThecollegestudentsinChinaare_______fromsmokingoncampusbecausethiswilldothemnogood.

Inordertoincreaseouroutput,weneedtoimportmoreproduction_______.

He_______tostudyharderinthefuturesothathecouldhavemoreopportunitiestofindabetterjob.

Theengineersinthislabspentseveralweeks_______theirplansforthenewbicycle.

Ifyouhaveanyproblemsduringyourstudyhere,pleasedonot_______tocallmeforhelp