15. I take part ………….. most youth activities of my school.
A. in B. of C. on D. at
IV/ Dựng đỳng thời, dạng của động từ cho trong ngoặc. (10đ)
Nowadays, a lot of important inventions (1- carry out) by scientists (2- work) for large industrial firms.
However, there (3 – be) still opportunities for other people (4 – invent) various things. In Britain, there is a
weekly TV program which (5 – attempt) to show all the devices which people (6 – invent ) recently. The
people (7 – organize) the program receive information about 700 inventions per year. New ideas can (8 –
develop) by private inventors. However, it is important (9 – consider) these questions : Will it work? Will
it (10 – want)? Is it new?
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