Exercise 4 : Complete the following sentences using the present perfect continuous forms of the verbs in brackets. Question 1 : He_____(wait) all the morning. Question 2 : Richard_____(do) the same job for 20 years. Question 3 : I_____(study) English for six months. Question 4 : Mike_____(work) in Las Vegas for the last few months. Question 5 : It_____(rain) since lunchtime. Question 6 : Helen_____(read) this book for three days. Question 7 : Kevin_____(look) for a job since he finished school. Question 8 : I’m tired of waiting. I_____(sit) here for one hour. Question 9 : He is exhausted because he_____(work) continuously for more than twelve hours. Question 10 : She_____(sleep) for 10 hours! You must wake her. Question 11 : He_____(read) this book for two hours, but he hasn’t finished it yet. Question 12 : That boy_____(wait) for the bus for half an hour. Shall I tell him that the last bus has already gone? Question 13 : They_____(argue) very excitedly all this time. Shall I come and interrupt them? Question 14 : What have you done with my bag? I_____(look) for it for an hour and I haven’t found it yet. Question 15 : I_____(think) over what you said since yesterday.