Página — Uerakua Anapu Uantakua Projects And Readings 3° Secundaria (pág. 40)

2. Individually, considering everyone else, write the correct form of the verbs in parentheses to complete the sentences in present perfect tense.

a) The scientists (present) evidence that global warming is increasing every year

b) In the past few years, wildfires (increase) in scale and frequency in many communities.

c) Researchers (debate) the value of teaching students to interpret phenomena in terms of energy forms.

d) Recent studies (show) that a few students develop an understanding of energy concepts.

e) In my town, the river (decrease) its level.

a e

3. Complete the following sentences in present perfect or past simple. Choose the correct option.

a) Have you the ingredients?

mixed maxed mix melt

b) She complete the experiment.

does didn't do did

c)Ⅰphysics classes.

take took taken taked

d)We the formula to make it rain.

discovered discover discount did

e)she done the experiment?

Have Has Did Haven't



se apa ( n p esuy

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