The pregnant woman always sits in the nonsmoking area of restaurants to reduce her exposure ________ smoke.
| A．to | B．with | C．in | D．from |
. Meeting my uncle after all these years was an unforgettable moment, ________ I will always treasure.
| A．that | B．one | C．on which | D．what |
. Society as a whole has a responsibility towards its weaker members, ________ as a result of circumstances they could not control, such as illness and disaster.
| A．people suffered | B．who suffering | C．people who suffered | D．which suffer |
. The thought worried him much ________ he might fail in the exam.
| A．that | B．which | C．when | D．so that |
. Now that energy prices are rising so rapidly, further prices are very uncertain, and the risk ________ a new investment depending on them may fail is greater.
. There are signs ________ restaurants are becoming more popular with families.
| A．that | B．which | C．in which | D．of which |