B. to chat

Cars will run ________ electricity or methane gas.

You don’t need any ______ to work here.

Choose the word that has a stress pattern different from that of the rest.

Find the mistake.

I need some advices that can help me to reduce the feeling of pressure and make a good impression.

The theater was _______ damaged in the explosion and will have to close.

I _________ the homework by the time you come back.

Much _______ be studied, he didn’t pass the exam.

Jenny has learned to play __________ piano since she was 6.

Not only Linda but also all of them _________ put down the names for the course Latin.

Generally the advantages of exams _________ the disadvantages.

Choose the word that has an underlined part sounded differently from that of the rest.

Many villages were _________ in bombing raids.

They are trying to presuade the rich to contribute their money ________ the charity.

Find the mistake.

Scarely she had put the telephone down when her boss rang back.

Choose the word that has an underlined part sounded differently from that of the rest.

_________ the end, the get married and live happily ever after.

Choose the word that has a stress pattern different from that of the rest.

Some of the people ________ to the party can’t come.

__________ anyone call, please tell them I’m busy.

He want to _________ a course in art and design.

Her father _________ a heavy burden of responsibility.

Which driver was to blame ________ the accident?

A: “Do you think she will come?”

B: “__________. I can’t stand her”

You should bring letters of ________ from your previous employers.

C. Sóng điện từ có thể bị phản xạ, khúc xạ như ánh sáng

C. Tia hồng ngoại có bước sóng lớn hơn ánh sáng màu đỏ

B. chu kì dòng điện

Trong chân không, sóng điện từ có bước sóng nào sau đây thuộc vùng khả kiến?

A. 600 nm

B. 0,7 mm

C. 600 $\mu m$

D. 0,7 nm

B. tỉ lệ thuận với cường độ dòng điện

Trong thông tin liên lạc bằng sóng vô tuyến, bộ phận nào sau đây ở máy thu thanh dùng để biến dao động điện thành dao động âm có cùng tần số?