At first, mobile phones were big and (15) _______

15/31

It was invented in the 1970s. At first, mobile phones were big and (15) _______.

were only used for making calls

only are used to call other people

only is used for calling people

was only used to calling people

Giải thích

Đáp án đúng: B

decide to V = quyết định làm gì

Dịch nghĩa: After finishing her studies, she decided to accept the job offer in another country. (Sau khi hoàn thành việc học, cô quyết định chấp nhận lời mời làm việc ở một quốc gia khác.)