SCIENTISTS HAVE TRIED VERY HARD TO FIND A CURE FOR THIS DISEASE.ENO...

5. - DE DAP AN HSG AV9 GIALAI 2010 2011
Lớp 9 Tiếng Anh DE DAP AN HSG AV9 GIALAI 2010 2011

5. Scientists have tried very hard to find a cure for this disease.

Enormous effort ………...

Finish each of the following sentences in such a way that it is as similar as possible in meaning to the original

sentence. Use the word given and other words as necessary. Do not change the form of the given word. (4 pts)