① 「実験をする」という意味にならないものを選びなさい。

• do an experiment

• carry out an experiment

• conduct an experiment

• put an experiment

① 正しい語順を選びなさい。

They often do it to find out

　　　　　　　　　　[ 　　　].

• how animals are intelligent

• how intelligent animals are

• how are animals intelligent

• how are intelligent animals

③ 文頭のsomeは何を指すか選びなさい。

Some can even communicate with human beings.

• various animals

• scientists

• chimpanzees

• birds

③正しい形に直しなさい。

They communicate with human beings

[　　　] a kind of sign language.

• use

• to use

• are using

• using

④[　　]内に適する語を選びなさい。

Those birds not only repeat [　　] people say to them but sometimes express their own feelings.

• what

• which

• when

• why

⑤ 主語と動詞の組み合わせを選びなさい。

Early in the twentieth century, a horse named Hans became famous for his intelligence.

• horse - named

• horse - became

• Hans - named

• Hans - became

⑪正しい語順を選びなさい。

Hans really was [　　　].

• intelligent enough to add

• enough intelligent to add

• enought to add intelligent

• to add enough intelligent

⑯正しい形にしなさい。

It was time to stop [ count ].

⑰正しい語順を選びなさい。

Horses are not really [　　　　].

• to count enough smart

• count to smart enough

• enough smart to count

• smart enough to count

⑱[ 　　]内に適する語を入れなさい。

Animals could sense slight changes that are [　　　] tiny for most humans to notice.