Supply the correct form of the words in brackets
The (dump)1 ………………… of phosphates and fertilizers into rivers speeds up the growth of algae. These
plants then take over the rivers, and in the process of (respire)2 ………………… they begin to use up the
oxygen in the water. As a result, local aquatic life often dies from (suffocate)3 …………......……, and we may
soon see the (appear)4 ………..........………… of many native fish from our water ways. The illegal (log)5
………………… of trees to supply foreign buyers with timber products quickly leads to (forest)6
…………....……… In turn, this soon causes the (erode)7 …........……… of topsoil. Without topsoil, as soon as
heavy rain arrives, (flood)8 …………… is likely to occur as a result.
Herbicides have long been used for the (eradicate)9 ………………… of disease in crops. However, genetic
engineering experiments have led to the successful (modify)10 ………………… of certain plant genes.
Therefore, the (cultivate)11 ……………… of crops such as corn and wheat which have a stronger (resist)12
……………… to disease is now possible
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Sinh Học lớp 12
