1Add to the statements (1-10) using the extra information (a-j)
Example: A barcode is a pattern of printed black lines which supermarkets use for pricing.
1. A motherboard is a printed circuit board. a. It contains the main electronic components.
2. A password is a secret set of characters. d It adds features to a computer.
3. A monitor is an output device. c. It is about the size of a piece of paper.
4. A disk drive is a unit. d. It allows access to a computer system.
5. An expansion card is an electronic board. e. It controls all the other boards in a computer.
6. A notebook is a portable computer. f. It displays data on a screen.
7. The system unit is the main part of the computer. g. It reads data from a CD-ROM disk.
are discussing / have been discussing
is working / has he worked a long? / he has been working
teaches / has been teaching
know / have you known / have known
Честно говоря, меня немного поставила в тупик эта часть: He (to work) long?
Возможно ты что-то пропустила там. По логике должен был быть вопрос "Как долго он уже работает" - "How long has he worked?" Но на этот вопрос не может быть ответа, который следует дальше (-Yes, he...) Так что здесь возможен косяк. Остальное, надеюсь, сделал правильно))