Have you ever been to (a)   before?

No, I haven't.

Where has she been?

She has been to (a)   and has seen lots of wild animals.

Which country do these pictures remind you of?

(a)  

Has he ever been to (a)   ?

Yes, he has.

Fill in the correct form of verb.

She has (a)   a camel before.

Fill the correct form of verb.

They have (a)   rafting before.

Fill the correct form of verb.

He has (a)   scuba diving before.

Fill in the correct form of verb:

He hasn't (a)   a mountain yet.

Fill in the correct form of verb:

She has (a)   the pyramids before.

Fill in the correct form of verb.

His family has (a)   in a rain forest before.

Fill in the gap (điền từ thích hợp vào chỗ trống):

In 1953, twelve (a)   mountain climbers wanted to climb to the top.

Fill in the gap (điền từ thích hợp vào chỗ trống):

The students were (a)   to their teacher for helping them in studying.

Topic: Use a compuer. Fill in the gap.

I have just (a)   .

Topic: Use a compuer. Fill in the gap.

He has just (a)   .

Topic: Use the computer. Fill in the gap.

I've just (a)   .

Topic: Use the computer. Fill in the gap.

She's just (a)   .

Fill in the gap (Điền vào chỗ trống):

I have already (a)   .

Fill in the gap (Điền vào chỗ trống):

He's already (a)   , but he hasn't played it yet.

Fill in the gap (Điền vào chỗ trống):

I've already (a)   , but I haven't sent it yet.

Fill in the gap (Điền vào chỗ trống):
She's written the email, but she hasn't (a)   yet.

Fill in the gap:

Scientists have designed (a)   to turn energy from the sun into the electricity.

Fill in the gap:

Scientists have designed (a)   that make electricity on many rivers.

Scientists have designed (a)   that use strong winds to make energy.