IV.       Read and choose the correct word in the box to fill in the blank. There is an extra word. There are three major forms of fossil fuels: coal, oil and natural gas. All three were formed many hundreds of millions of years ago before the time of the dinosaurs  – (26)               , we call them fossil fuels.

Fossil fuels (27)                 millions of years to make. But they are not unlimited. We are using up the fuels that were made more than 300 million years ago. They are not (28)    _like solar power, wind power, hydro power or biomass. Once they are gone they are gone. So, it’s best not to waste fossil fuels.

We can save fossil fuels (29)              _conserving energy. One simple way to do this is to turn off appliances, TVs and radios that we are not using. We can also turn off lights when no one is in the room. Another way is to go by bike or walk instead of (26) cars or motorbikes.

IV.    Give the correct form of the word given to complete the sentence.

12.   Tidal energy is renewable,                   and clean. (plenty)

13.   It was not                _ that she failed her test. She never studied. (surprise)

14.   Now I’m                 . I didn’t get you a present. (embarrass)

15.   Edison is one of the greatest                   in the world. (invent)

IV.Find the mistake in each sentence below.

12.   Because (A) there was (B) an accident, everyone (C) was fine (D).

13.   He will (A) clean (B) his house at 9 a.m. (C) tomorrow (D).

14.   There are less (A) TV programs for (B) teenagers than (C) there are for adults (D).

15.   Every day I go to work (A) by foot (B), but she drives (C) to (D) work.

IV.    Choose the correct answer A, B, C or D to complete these sentences.

12.   I am the most intelligent student in the class,                  ?

A.   am I                           B. do I                            C. isn’t I                                     D. aren’t I

13.   The new law limits smoking in public. There are                     places where people can smoke.

A.   many                        B. less                            C. fewer                                     D. more

14.                          does it take to go from Hanoi to Ho Chi Minh city by plane?

A.   How much              B. How many                C. How long                              D. How far

15.   Last night, I didn’t go to bed early                   being very tired.

A.   because of               B. although                  C. despite of                             D. in spite of

16.   I have never felt as                           as I did when I watched that horror film.

A.   terrify                       B. terrified                   C. terrifying                              D. terrible

17.   At this time next week, we                     _ a wind turbine in our garden.

A.   install                        B. installed                   C. will installed                         D. will be installing

18.   With that device the wave energy                   into electricity.

A.   will change              B. changed                    C. will be changed                    D. will be changing

19.   My jacket is on the chair,                   is on the table.

A.   she                            B. her                            C. hers                                        D. she’s