Choose a correct letter A, B or C
31 Bees that help with pollination benefit flowers and
A female plants only
B pollen
C fruit trees
32 Bees produce wax that can be made into candles and
A honey
B polish
C pollen
Questions 33-35
Complete the sentences below.
Write NO MORE THAN TWO WORDS for each answer.
33 Dragonflies eat ______
34 Insects in summer can be harmful because they can carry such deadly diseases as malaria, yellow fever and ______
35 Harmful insects may destroy crops, clothes, furniture, and even the ______
Write NO MORE THAN TWO WORDS for each answer.
How to kill bad insects
Chemical methods
These solutions to insect problems often are not worthwhile because:
a) They are effective solution on a 36 ______
b) They can bring harm to not only animals such as horses but 37 ______
c) Insects become 38 ______ to the chemicals quickly.
Biological methods
These methods are 39 ______ than chemical methods of eliminating insects.
Breeding control
In order to control the breeding of insects, one needs to understand the insects’ 40 ______
答案
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