1. has broken/ irregular

2. has allowed /regular

3. has introduced/ regular

4. has seen/ irregular

5. has listened/ regular

6. has written/ irregular

7.has seen/ irregular

8.has listened/ regular

9.have spoiled/ regular

10.has writeen/ irregular

6) Sparky (taste) has tasted his new dog food, and he seems to like it. his new dog food, and he seems to like it.

7) The police (arrest) has arrested two men for the robbery. It is time to question them. two men for the robbery. It is time to question them.

8) The medicine (cure) has cured William’s illness. It seems miraculous.

1- has Eated                        2- has writed                         3- have taked

4- have been                      5- have drinked                       6- has singed

7- have had/gotten             8- has hided                            9- has been

10- has showed                11- has weared                        12 has drived

13- has rode                     14- have became                     15- has began

1. has broken/ irregular

2. has allowed /regular

vì sao ban lại copy bài trên
 

6) Sparky (taste) taste his new dog food, and he seems to like it.

7) The police (arrest) artis two men for the robbery. It is time to question them.

8) The medicine (cure) __cure_____ ________ William’s illness. It seems miraculous.

1) Mark (eat) eating dinner already. He is not hungry.

2) Beth (write) writing three letters today. She misses her family.

3) Yoko and Armand (take) taking  the test. Now they can relax.

4) Marty and I (be) be to Costa Rica three times. We are familiar with the culture.

5) I (drink) drink six cups of water today.

6) Eva (sing) singing in a chorus before. Her voice is pretty.

a) Ta có C1 = D2 = \(60^o\), mà 2 góc này so le trong => AC // BD

b) AC//BD (cmt) => B2 = A1 = \(80^o\) (đồng vị) Mặt khác, A1 + A2 = \(180^o\) (kề bù) => A2 = \(180^o\) - A1 = \(100^o\)

c) Ta có B + B1 = \(180^o\) (kề bù) => B1 = \(180^o\) - B = \(100^o\)

c) \(\widehat{A1}=\widehat{B1}\)(là 2 góc so le trong)

    Mà \(\widehat{B1}=50độ\)
\(\Rightarrow\)\(\widehat{A1}=50độ\)

Vì \(\widehat{A1}+\widehat{A2}=180độ\)(2 góc kề bù)

Hay 50độ + \(\widehat{A2}\) = 180 độ

                    \(\widehat{A2}\) = 180độ - 50độ

                    \(\widehat{A2}\) = 130độ

Vậy \(\widehat{A1}=50độ\)

       \(\widehat{A2}\) = 130độ