根据句意完成句子  (共20空 ，记10分)

1. Without a good knowledge of vocabulary, many a student ______ _______ _______ English. (学英语有困难)

2. Parents _______ _______ _______ _______ _______ a qualified teacher was to have a profound effect on the children in their life.  (想当然)

3. You’d better ______ ____ _______ ____ (留意)the advertisement since you are looking for a job.

4. It is likely that some students during the free periods _______ _______ _______ _______ all the time.    (假装学习)

5. ________ ________ ________ ________ the number of the students appreciates reading China Daily will be on the increase. (有可能)