Read the text below and decide which answer (A,B,C, or D) best fits each space.
The next generation of telephone users will probably laugh (1) _______ we explain how we used to stand next to a wall in the kitchen to (2) _______ a phone call. Mobile communications, already highly advanced compared with a decade ago, will completely change communications in the next few years. (3) _______ there are millions of people using mobile phones, most people know (4) _______ about the mobile telecommunications industry and its technology.
There are three types of mobile phone. These are hand portables, pocket-sized hand portables and transportables. The smallest and most popular are the pocket-sized hand portables. These work on rechargeable batteries, which allow an (5) _______ of up to 80 minutes' conversation. Mobiles that are fitted permanently in a vehicle do not (6) _______ on separate batteries. They require an external aerial on the vehicle. This can mean a stronger signal with clearer (7) _______. Transportables have a high power capability and can be used (8) _______ anywhere. They come with powerful battery packs for longer, continuous use and may also be put (9) _______ a vehicle, using its electrics. They (10) _______ to be bulkier than hand portables.
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Lời giải:
Báo sai5. D. => an average of sth: số lượng trung bình của cái gì
* các từ khác không dùng được trong câu này:
- a amount of + Danh từ KHÔNG đếm được.
- an account of: bản báo cáo về cái gì
- an activity of => không có cấu trúc này