U5_Grammar_Present Perfect

They ........ known each other since their childhood.

*childhood: thời thơ ấu

• have

• has

The children ......... just left their home.

• have

• has

Our teacher ......... arrived yet.

• haven't

• hasn't

.......... you been to Singapore before?

• Have

• Has

One of the students in our class .......... ever experienced scuba diving.

• have

• has

Have you ever .............. an eclipse before?

*eclipse: Nhật thực

• see

• saw

• seen

• seeing

I've never ......... anything valuable before.
*valuable: có giá trị, đáng giá

• lose

• lost

• losing

Someone ............ away my jacket.

• has just taken

• have just taken

• just have taken

• just has took

• have just took

Answer explanation

Các đại từ bất định đều là danh từ số ít. Ví dụ:

everyone, everybody, everything

someone, somebody, something

anyone, anybody, anything

no one, nobody, nothing

I haven't .......... anything for 8 hours.

• eat

• eating

• eaten

• ate

How many e-mails have you ........ to me recently?

• wrote

• writing

• write

• written