2000 câu trắc nghiệm tổng hợp Tiếng Anh 2025 có đáp án (Phần 20)

Studies have shown that people who don't have breakfast have a low blood sugar level and are often slow, tired, hungry and (3)______ to concentrate.

3/67

Studies have shown that people who don't have breakfast have a low blood sugar level and are often slow, tired, hungry and (3)______ to concentrate.

able

enable

unable

capable

Giải thích

c. unable

Giải thích:

unable to V: không thể làm gì