Clever crow and revision (7/3)

The birds _____ to Christophe when he calls their names.

(Những chú chim _____ đến chỗ Christophe khi anh ấy gọi tên chúng)

• fly

• understand

The birds ________ how to get a reward.

(Những chú chim ______ cách để nhận được phần thưởng)

• understand

• look for

The birds _______ the kinds of things to find.

(Những chú chim ______ các loại đồ vật để tìm)

• fly

• know

The birds get food ____ a reward

• of

• as

The birds ______ the trash in the box.

• have

• fly

• put

Crows are clever in any ways. For example, they can ______ problems.

In one experiment, scientists ______ crows to get food from the box. (dạy cho)

One hour later, they show the crows _______ tools

• different

• differ

• differing

• diffening

The crows usually choose the ______ tools

(Những con quạ thường chọn những dụng cụ chính xác)

Alan: Can Elisa swim?

Alex: No, she ______