Are you looking (1)………………………a cheap, clean, effective source of power that doesn’t (2)…………………………pollution or waste natural resource? Look no further than solar energy. While most fuels now in use are (3)………………………burned at a big rate, solar energy, a power from the (4)………………………, will last as long as the world (5)……………………….This energy has been (6)……………………..to heat and cool homes or to cook food. It has been used (7)…………………… radio batteries and provided power for telephone lines. The devices, (8)…………………….., are cheap to operate but very expensive to produce.

Điền vào số 8

A. maybe

B. perhaps

C. so

D. however

The roof of the building __________ in a storm a few days ago.

A. damaged

B. was damaged

C. has damaged

D. has been damaged

Choose the best answer A, B, C or D to complete the following sentences

A severe tropical ___________ is called a typhoon.

A. drought

B. rain

C. flood

D. storm

If the weather is good tomorrow, we ........ there.

A. go

B. to go

C. will go

D. goes

Loại động cơ điện một pha mặt trong lõi thép có cực để quấn dây thường chế tạo với công suất:

A. Lớn

B. Nhỏ

C. Vừa

D. Đáp án khác