Choose the letter A, B, C or D to complete the passage

An increasing number of people are now going on (1) ________ to Egypt. Last year, for example, about one and a half million tourists visited this country. The population of Egypt is about fifty million and the (2) ________ is Cairo, a busy city of just under nine million people. Although the weather is hot and dry and most of the country is desert, the average temperature from October to March is not too high. The most (3) _______ sights are the pyramids at Giza. However, it is also pleasant to visit Alexandria, Port Said and several other places and do as much (4) ________ as possible in the time available. A trip to Luxor is an unforgettable experience. It is not difficult to go there because there are frequent (5) ________ there from Cairo.

Question 4:

A. joining

B. sightseeing

C. looking

D. thinking

Cho đường tròn (O; 6cm). Điểm M cách điểm O một khoảng 4cm. Hỏi qua M kẻ được bao nhiêu tiếp tuyến đến đường tròn?

A. 1

B.2

C. Vô số

D. 0