Make complete sentences using the word given words/phrases. U may need to make any change if necessary expect the order of the words/phrases.

1. government/ certain/ education system/ be/ improve/ significant/ by/ year 2020.

2. Son Doong Cave/ be/ recognize/ one/ most beautiful/ caves/ earth/ BBC.

3. some countries/ English immerson schools/ build/ creat/ all-English environment/ English learners.

4. students/ nowadays/ have/ keep/ learn/ and/ be/ responsible/ buid/ future career.

pls giúp mình vớiii, mình cảm ơn :<<

Last weekend, six students from the Donoho School went on a fascinating trip back in time. These students accompanied Jacksonville State University professor William Bannister on a fossil hunt.

The students, professor, and three graduate assistants headed to a valley near Cheaha Mountain. The valley was not previously known to have any fossils in it. However, two months ago, some campers in the valley stumbled upon some bones sticking out from the ground. When they brought them to the museum, they were told that the bones were those of a brontosaurus, a species of dinosaur.

Thanks to a generous grant from the Damke Foundation, the students were able to accompany the professor on his dig. They spent most of both Saturday and Sunday carefully digging in the area.

"We found a few bones," said Wendy Jacobs, a Donoho senior. "We're not sure which animal they're from, but the professor assured us they were from a dinosaur."

The students, all of whom intend to major in science at college, are looking forward to returning this coming weekend. "There's enough money in the grant for the next month, so we should get to return at least three more times." said Donoho student Philip Peters.

A. within a week
B. in two months
C. during summer vacation
D. next autumn