1£®________ is assumed that stress is mainly caused by too much work.

2£®I had no alternative but ________  report him to the headteacher.

3£®She has kept up physical training for several years without ________ (interrupt)£®

4£®The more we are aware of the ________ (significant) of this famous saying, the more benefits we will get in our daily study and job.

5£®If you study in a ________ (system) way, you won't leave anything out.

6£®The plants need the right amount of sunlight and rain to grow and ________ (ripe)£®

7£®The mechanic who wishes to do his work well, must first ________ (sharp) his tools.

8£®The escaped prisoner got ________ (arrest) immediately he turned up at the railway station and was sent to prison again.

9£®He could have finished it on schedule, but ________  he fell behind.