Unit 11: Changing roles in society - Getting started

Thưa thầy/cô. Em có vấn đề chưa hiểu, em xin đặt câu hỏi như sau:
Vocabulary - 6sGive the correct forms of the words in the brackets to complete the passage
CITY CENTRE TRAFFIC PROBLEMS
The amount of traffic in the crowded central districts of some of our largest cities is a major problem these days. Over the years, (1. VARY) ______________ schemes of traffic management have been tried, none of which can be said to have been entirely (2. SUCCESS) _____________. In order to (3. COURAGE) _______ people to leave their cars at home, especially on shorter trips, it is becoming increasingly common for cities to impose a fee on those drivers who choose to come into the city centre.
Some schemes take advantage of the latest technology - for example, in one city (4. PAY) ______________ is made by a card on the car's windscreen which is scanned (5. AUTOMATIC) ______________ . This is meant to speed up the flow of traffic, but the scheme has a major (6. ADVANTAGE) ___________ as the amount that drivers have to pay changes during the day and, as a result, it is not (7. USUAL) __________ for long queues to build up just before a cheaper charging period comes into (8. OPERATE) _____________. However, the system is gradually gaining in (9. POPULAR) _______________ with motorists, although it has to be admitted it may not provide a total (10. SOLVE) _______ to the problem of traffic congestion.
III. Give the correct forms of the verbs in brackets to complete the sentences.
1-2. The first Olympic Games (take) _______ place at Olympia in Ancient Greece nearly three thousand years ago. They (hold) _______ every four years.
3-4. Give me Peter's letter. If I (see) _______ him, I (give) _______ it to him.
5-6. He only (start) _______ his work an hour ago. He (not finish) _______ it yet.
7-8-9. When I (phone) _______ Helen last night, she (wash) _______ her hair, so she (not answer) _______ the phone.
10. A lot of people (kill) _______ by AIDS recently, and I wish nobody would die any more.

Nhờ thầy cô hỗ trợ giúp em ạ. Em cảm ơn.