II. Supplythe correct verb form: The Present Perfect or The Present Perfect Continuous.

1.Scientists (know) for a long time that vitamin D is essential for humans.

2.I (wait) for two hours, but she (not come) yet.

3.Due to global warming, both human beings and animals (feel) the heat.

4.I (have) the same car for more than ten years. I’m thinking about buying a new one.

5.The Earth’s atmosphere (warm, continuously) since 2000.

6.Mary (lose) her hat and she (look) for ỉt until now.

7.His personal problems (distract) him from working for the whole morning.

8.I (work) for this company for more than thirty years, and I intend to stay here until retire!

9.In the past half-century, scientific and technologỉcal advances (transiform) our world. 10.In spite of getting the highest result in the class ,John still (have) problems with the teacher.

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