Circle the correct answers.

1. They just installed / have just installed some interesting software on the school computers. The programmes are working very well and everyone enjoys to use /using them.

2. Smartphones allow people sending / to send information over long distances. Learn / To learn with a smartphone is fun as well.

3. Since television was invented / has been invented, TV designs changed / have changed a lot.

Lời giải chi tiết:

1. They have just installed some interesting software on the school computers. The programmes are working very well and everyone enjoys using them.

Giải thích:

- just (vừa mới) là dấu hiệu thì hiện tại hoàn thành; S + has/ have + Vp2

- enjoy + Ving: thích làm gì

2. Smartphones allow people to send information over long distances. To learn with a smartphone is fun as well.

Giải thích:

- allow to V: cho phép ai làm gì

- To V đứng đầu câu làm chủ ngữ

3. Since television was invented, TV designs have changed a lot.

Giải thích:

- Cấu trúc thì hiện tại hoàn thành: S + have/ has + Vp2 since + S + V-ed

- Cấu trúc thể bị động thì quá khứ đơn: S + was/ were + Vp2