根据句意，选择单词或短语并以其适当形式填空。

at large             react to             roll call             safe and sound          keep one's head in case             hold on to          warn...of...          be cleared of             the moment

【小题1】To the astonishment of the public, up to now, the government hasn't ________ the problem.
【小题2】The doctor shares his phone number with the patient ________ they need medical assistance.
【小题3】Before the government makes a decision, they should consider the opinions of the public ________ .
【小题4】With the joint efforts of the cleaning workers, the streets ________ snow.
【小题5】Having been missing for three days, the girl returned home ________ at last, which made her parents relieved.
【小题6】He ________ the back of the chair to stop him from falling.
【小题7】No matter what difficulties we are faced with, we should ________ and hold the belief that we can go through.
【小题8】I want to see him ________ he arrives.
【小题9】Beside rivers, there are often signs which ________ the people ________ the danger, but some people often ignore them.
【小题10】Before every class, our teacher will make a _____to check whether all the students are in class on time.