UNIT 15. COMPUTERS
Vocabulary:
have access (v): truy cập
computer (n): máy vi tính
requirement (n): sự yêu cầu
printer (n): máy in
campus (n): ký túc xá
turn on (v): bật lên
restrict (v): giới hạn, hạn chế
bulletin board (n): bảng tin
connect (v): nối, kết nối
technology (n): công nghệ
properly (adv): hoàn hiện, hoàn chỉnh
skeptical (a): có tư tưởng hoài nghi
plug (n): cắm
method (n): phương pháp
socket (n): ổ
impact (n): ảnh hưởng
manual (n): sách hướng dẫn sử dụng
jack (n): ổ cắm
guarantee (n): bảo hành
tray (n): khay
button (n): nút
icon (n): biểu tượng
challenging (a): mang tính thách thức
path (n): đường
post (v): đăng, đưa thông tin lên mạng
monitor (n): màn hình
remove (v): di chuyển
mouse (n): con chuột (máy tính)
load (v): đặt vào
screen (n): màn hình
depart (v): bắt đầu
adjust (v): điều chỉnh
degree (n): bằng cấp
knob (n): núm điều chỉnh
document (n): tài liệu, văn bản
message (n): thông điệp, lời nhắn
line (n): đường (dây)
install (v): cài đặtGrammar:
Thì quá khứ đơn:
(+) S + was/ were + …
(-) S + was/ were not (wasn’t/ weren’t) + …
(?) Was/ Were + S + … ?
(+) S + V 2/ed
(-) S + did not (didn’t) + V
(?) Did + S + V ?

Dấu hiệu: yesterday (hôm qua), …ago (cách đây…), last…, in + năm (< 2019), in the past
Thì hiện tại hoàn thành
(+) S + have/ has + V 3/ed
(-) S + have/ has not (haven’t/ hasn’t) + V 3/ed
(?) Have/ has + S + V 3/ed?

Dấu hiệu:
for + khoảng thời gian
since + mốc thời gian
…times (lần): She has made the same mistake three times.
already (nhấn mạnh hành động đã hoàn thành sớm hơn thời gian dự dịnh): He has already started.
yet (chỉ dùng trong câu hỏi và câu phủ định)
(-) I haven’t told them about the accident yet.
(?) Has it stopped raining yet?
C. Exercises:
l. Complete each sentence with the suitable word in the box.
monitor - computers - treshman - knob - guarantee - printer
skeptical - library - bulletin board - technology - time-consuming
1. A is a machine for printing text onto paper.
2. This machine is still under so the manufacturer will repair it.
3. Some can work 50.000 times faster than a man.
4. Some of the more jobs can be clone by machines.
5. Adjust the if the screen of the …………………… is too dark.
6. Harry is in the first year at university. He is a .
7. They post ntessages on the .......... and find other peoplewho want to talk about.........the same topic.
8. I`m rather about his chances of winning.
9. Many students are sitting and reading hooks and imtgazines in the ...............
10.This enables computers to read handwriting.
II. Write sentences, using the present perfect with already and yet.
Ex: I/ buy/ a jacket. => I have already bought a jacket.
He/ not finish/ his project. => He hasn’t finished his project yet.
1. David/ leave/ the party.
2. I/ not receive/ his letter.
3. The manager/ come/ the office?
4. We/ see/ that film.
5. Laura/ not find/ a job.
6. It/ stop/ raining?
7. He/ drink/ three bottles of beer.
8. We/ not hear/ anything from them.
9. you/ post/ the letter?
10. They/ go/ to Brazil.
III. Complete the dialogues, using the present perfect of the verbs in brackets.
1. A: Would you like something to eat?
B: No, thanks. I have just had lunch. (just/ have)
2. A. Do you know where Julia is?
B: Yes, I her in the street. (just/ meet)
3. A - What time is he going?
B